Aquinas First Way

To what extent does Aquinas’ Cosmological Argument successfully reach the conclusion that there is a transcendent creator? [40]

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Aquinas’ Cosmological Argument fails to demonstrate the existence of the Christian God.  While the first, second and third ways offer some support to the belief that there must be a Prime Mover, Uncaused Cause and Necessary Being, In the Summa Theologica 1,2,3 Aquinas only asserts that “this is what all men speak of as God.”  Indeed, taking the Prime Mover as an example, it could share only some of the characteristics of God as He is normally understood.  While the Prime Mover is certainly transcendent and immutable, the extent to which it could be omnipotent or omniscient, let alone omnibenevolent or immanent, is slight and unconvincing.  Nevertheless, putting this criticism aside, Aquinas’ Cosmological Argument successfully demonstrates the existence of a transcendent explanation for the Kosmos.

Firstly, in Dialogues Concerning Natural Religion Hume’s character Philo criticised the Cosmological Argument, asking how anybody can be certain that everything has a cause. While it is true that the observed laws of nature which form the premises of Aquinas’ argument depend on observations which are necessarily limited within time and space, questioning whether such observations can be taken to be fair and representative attacks the Cosmological Principle on which all science depends.  Newton was the first to express the Cosmological Principle, the assumption that “viewed on a sufficiently large scale, the properties of the universe are the same for all observers” or in other words that the universe is homogenous and isotropic and more fundamentally, that the way we observe the universe is the way it really is and that this is a fair and representative sample of the whole. In asking whether there might not be uncaused things in the universe despite the fact that these have never been observed, Hume’s criticism of the Cosmological Argument constitutes a sceptical attack on the human ability to use observations as a basis for understanding the Natural Laws which govern the universe, so by accepting this criticism we lose far more than one approach to demonstrating the existence of God.  It follows that Aquinas’ argument survives Hume’s first criticism and demonstrates the existence of a transcendent “creator”. 

Secondly, Hume’s character Philo goes on to ask why the cause of the universe, if such there is, would have to be intelligible.  This criticism is no more effective than the first.  The whole point of Aquinas argument is to show that whatever caused the universe must be transcendent and beyond human understanding, impervious to the laws of motion, causation and contingency that govern everything else.  For Aquinas, the cause of the universe is “neither something nor nothing,” a necessary being that does not exist as things exist, contingently, but rather eternally and immutably outside the framework of spatio-temporal reality.  While Kant argued that necessary existence is so far beyond our experience to be beyond possible knowledge, Aquinas does not claim to be able to know or understand God, only to deduce that He exists, albeit mysteriously.  It follows that Aquinas’ Cosmological Argument survives Hume’s second criticism and Kant’s criticism as well, demonstrating the existence of a transcendent “creator”. 

Thirdly, Hume’s character Philo argues that Aquinas’ argument relies on the Fallacy of Composition, and indeed Aquinas does move from observations of movement, causation and contingency in the universe to claiming that the universe as a whole must be moved, caused and have something to depend on.  Russell used the powerful example of all men having mothers but the human race not having a mother to explain Hume’s point.  However, while it is fallacious to assume that characteristics of the part MUST be true of the whole, it is not impossible that they are true of the whole.  Aquinas (and more recently Craig) appeal to common sense as well as fallacious reasoning when they argue that given that everything in the universe is caused, the universe must also have a cause.  The alternative, that the universe is uncaused or, as Russell put it, a “brute fact” seems unacceptable to most people today, not least because the Aristotelian infinite-universe paradigm has been replaced by Big Bang Theory which shows that the universe had an absolute beginning.  Masses of Scientific evidence now supports the claim that the universe had a cause, even if that cause outside of the normal laws of nature and so transcendent, even if this was not a “creator” as this would normally be understood.  It follows that Aquinas’ Cosmological Argument survives Hume’s third criticism and Russell’s criticisms as well, demonstrating that the universe has a transcendent cause, if not a “creator” precisely. 

On the other hand, Aquinas’ Cosmological Argument falls short of providing rational support for faith in the transcendent creator-God of Christianity.  As Hume rightly pointed out, there is no way to show that there could not be multiple uncaused causes of the universe, let alone that the cause would be omnipotent, omniscient, omnibenevolent or in any sense personal or capable of becoming incarnate in Jesus Christ.  Nevertheless, the question did not ask whether Aquinas’ argument successfully reached the conclusion that God exists, but rather asked whether the argument successfully reached the conclusion that there is a transcendent creator.  A transcendent creator may, but also may not be, the same as the God of Christianity.  In this case, Aquinas’ argument demonstrates the existence of a transcendent entity that is responsible for initiating and sustaining the universe but no more. 

In conclusion, Aquinas’ Cosmological Argument successfully reaches the conclusion that there is a transcendent “creator” but does not demonstrate the existence of God. As William Lane Craig has argued, it is for theologians to determine whether the attributes of the transcendent cause of the universe can be reconciled with those of the object of religious faith.  This is why his Kalam argument stops with the conclusion “the universe must have a cause” rather than making the leap to saying “and this is what all men speak of as God” as Aquinas boldly does. 

Aquinas’ first cause argument successfully proves the existence of God. Discuss. (40)

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Aquinas’ first cause argument is the second of his three versions of the Cosmological Argument, which form the first of his three ways to God in the first part of the Summa Theologica.  As a Cosmological Argument, Aquinas’ first cause argument starts from the observation of order, in this case causation, in the universe.  The word “Cosmological” derives from the Greek “Kosmos” which means both “order” and “universe”.  As Anthony Kenny[CV1]  explains, Aquinas relies on Aristotle’s theory of causation, as outlined in the Metaphysics Book IV.  Aristotle argued that all things in the universe have four causes, which can by understood in terms of the material, efficient, formal and final.  Material causes are the physical ingredients of things, efficient causes the agents that cause them to exist as they do, formal causes the definitions of things which make them what they are and the final cause to which things aim is their goal or telos and ultimately flourishing.  Focusing on efficient causation, Aquinas’ second way to God argues that everything in the universe is caused by one or more agents outside itself and nothing causes itself to exist.  If this is so then there is a problem – what was the first efficient cause.  An infinite chain of efficient causes makes no sense, because without a first cause nothing would exist.  Something cannot come out of nothing.  There must be a first efficient cause, but this must itself be uncaused, which makes it unlike any other thing.  The uncaused cause of the universe could then be said to be “neither something nor nothing” and, Aquinas concludes, this is what everybody calls God. As an inductive argument the conclusion of the Cosmological Argument, that God exists, is supported by observed premises which are falsifiable.  Because of this, Aquinas’ first cause argument cannot be said to prove God’s existence.  The problem of induction ensures that the most that the argument can be said to achieve is a very high degree of probability that its conclusions are, in fact, true[CV2] . Leaving the problem of induction and the issue of proof to one side: Aquinas’ first cause argument is still a convincing argument for the existence of God and, as William Lane Craig continues to argue, it is a useful means of defending the rationality of faith[CV3] . 

An immediate criticism of Aquinas’ argument is that it assumes that EVERYTHING in the universe is caused.  Although this claim is supported by Aristotle, it may be fair to suggest – as indeed JL Mackie did in “The Miracle of Theism” (1982[CV4] ) – that there may be things in the universe that are uncaused.  Indeed, Quantum Physics has concluded that there are sub-atomic particles that are in a sense uncaused. It could be that Aquinas’ first premise – that everything in the universe is caused – is untrue and if that is the case then the argument would fail. Nevertheless, it would be going too far to suggest that Physics has proven the existence of uncaused things in the universe.  Quantum particles could well be caused, for all we know, even though they appear not to be.  The most that Mackie’s criticism achieves is to show that Aquinas’ first premise must remain uncertain.  Although it seems likely on the basis of present experience that all things are caused, as Hume observed it is always possible that there are things in the universe that are uncaused and that these could explain the universe without recourse to God[CV5] . In this way, although Aquinas’ first cause argument is not entirely successful as an argument for God’s existence from observation, it is able to survive an obvious line of criticism.

In Dialogues Concerning Natural Religion (1779) Hume went on to suggest that the universe itself could be the uncaused cause of itself.  Russell made a similar point in his debate with Frederick Copleston[CV6] , suggesting that the universe should be seen as a “brute fact”.  This is certainly possible; Aquinas’ might be guilty of committing the fallacy of composition in reasoning that just because things within the universe need causes that the universe as a whole needs a cause.  Russell gave the analogy of mothers – just because all men have mothers doesn’t mean that the human race has a mother.  While Hume and Russell could well be right and the universe might be the cause of itself, this goes well beyond our experience.  It is just as difficult to theorise about the universe being self-causing as it is to theorise that it has an uncaused cause.  Neither conclusion can be drawn with any degree of confidence.  What does seem certain is that Aquinas is correct to reason that the universe must be explained in terms of something that is uncaused, whether that is within the universe, the universe itself – or God.  William Lane Craig[CV7] , in adapting the Cosmological Argument for modern Christian Apologetics, chooses to leave the argument at its first conclusion – that there must exist an uncaused causer.  He leaves it to Theologians to convince people that the uncaused cause is in fact “what everybody calls God” and it seems that his caution is sensible. Neither Aquinas’ first cause argument nor any other version of the Cosmological Argument can conclusively prove the existence of God, but the argument can point to the rationality of faith given the necessity for a cause for the universe which is unlike anything within our normal experience[CV8] .

Immanuel Kant advised such caution when in the Critique of Pure Reason he argued that the Cosmological Argument, like other inductive arguments for God’s existence, goes beyond the boundaries of what we can claim to know.  It is reasonable to observe that all things are caused and that there is a tension implicit in this which demands explanation – but it is not reasonable to draw conclusions about that explanation when they go beyond possible experience.  Perhaps this is where faith comes in; the first cause argument cannot successfully PROVE the existence of God, but it can point towards a mystery which is evident in the observed universe, a mystery which is suggestive of the existence of something supernatural if not of the God of Classical Theism.  As Hume pointed out, the first cause argument cannot claim to lead to the God of Christianity – even to a single God in fact – but limited as it is, the argument provides a useful defence for the believer[CV9] . 

 [CV1]Precise relevant detail and range of scholarly views

 [CV2]Acknowledging & engaging with the precise wording of the title – This also works to show the LIMITATIONS of the argument.

 [CV3]THESIS

 [CV4]Using a range of scholarly views.  This paragraph also serves as the COUNTERCLAIM, as it does cede some of the point that Mackie makes.

 [CV5]Evaluating the “maybe not everything has a cause” criticism, linking to the THESIS, justified, developed…

 [CV6]Range of scholarly views – again a bit of counterargument (balance) here, allowing that Hume and Russell have a point.

 [CV7]Range of scholarly views

 [CV8]Evaluating the fallacy of composition criticism and linking to the THESIS – justified, developed, sustained…

 [CV9]Drawing in Kant’s criticism & another of Hume’s in drawing the final CONCLUSION, which restates the THESIS – successful argument.  Builds step by step and is therefore convincing.

“Aquinas’ Cosmological Argument proves that God exists.” Critically evaluate this statement.  [40] 

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Cosmological Arguments start with the existence of the universe (Greek = Kosmos) and conclude that God is the most logical explanation of it.  They are some of the oldest arguments for God’s existence and have an intuitive appeal.  As Richard Swinburne observed in “Is There a God?” (1996)

“The human quest for explanation inevitably and rightly seeks for the ultimate explanation of everything observable.”

Cosmological Arguments can be found in the work of Plato (Laws Book X) and Aristotle (Physics Book II, Metaphysics Book IV) and make up the first four of Aquinas’ five ways to God in the Summa Theologica (1.2.3).   While Aquinas’ Cosmological Arguments are all framed as a posteriori arguments – and so could never provide proof – they do provide strong support for the existence of a Prime Mover.  Nevertheless, Aquinas goes too far in his claim that this is what everybody calls God.

Aquinas’ first way draws on the Aristotelian concept of movement. In the Physics, Book V, Aristotle wrote, “all things that are in motion must be moved by something.”  Motion does not necessarily mean movement in the sense that things are is moving through space from location A to location B, but rather that they are moving from a state of potentiality to a state of actuality in multiple different respects. As Aristotle wrote, movement involves the… “actualizing of some potency. It is because things have real potencies that they are able to change.”  Aquinas later wrote, “for motion is nothing else than the reduction of something from potentiality to actuality.”  Whereas Plato’s argument, later refined by Muslim scholars of the 8th Century Kalam School and more recently by William Lane Craig, focuses on a temporal series of causes much like a domino-rally, pointing towards a beginning in time, an uncaused cause, which is what everybody calls God, for Aristotle and for Aquinas, even if the universe is as infinite as it appeared to be, there is still the need for a Prime Mover because everything depends on other things.  As Parmenides, Heraclitus and separately the Buddha observed, everything changes or moves and nothing stays the same, but nothing changes or moves without being moved by something else, even if that is just time itself.  As Aristotle wrote, “potential, precisely because it is potential, cannot make itself actual”.  Aristotle concluded that there must be a Prime Mover outside time and space, but stops short of claiming that this is God.  Aquinas went further, claiming that this Prime Mover is “what everybody calls God”, but in doing this he weakened the argument. It is true that the Prime Mover must be outside time and space and thus wholly simple and unchanging, pure actuality and with zero potentiality.  As Aquinas wrote,

“nothing can be reduced from potentiality to actuality, except by something in a state of actuality… it is impossible that in the same respect and in the same way a thing should be both mover and moved…” 

It is also true that everything ultimately depends on the Prime Mover for its existence.  As Aquinas wrote, “therefore it is necessary to arrive at a first mover, put in motion by no other”  However, it is a step too far to claim that the Prime Mover could be seen as the “creator”, let alone act in the world, speak to human beings or be crucified and rise again. When Aquinas writes “and this everyone understands to be God”  He goes beyond the evidence and possible knowledge.  In his book “The Nature of God” Gerard J. Hughes describes the Prime Mover changing potentiality to actuality in terms of a bowl of milk causing a cat to cross a room.  The bowl of milk does nothing, in the way that the Prime Mover – being timelessly unchanging and impassive – does nothing, because it has no potential and is pure act. It follows that Aquinas’ first framing of the Cosmological Argument provides strong support for the existence of a Prime Mover, but not for the existence of the God that Christians worship, because the Prime Mover would be unable to say “let there be light”, work miracles or judge individuals on the final day… all of these require in God potential and the ability to act in time, which the Prime Mover cannot have.

Aquinas’ second way draws on the Aristotelian concept of efficient causation.  For Aristotle, all things have four causes – material, formal, efficient and final.  Efficient causes are agents which bring things into being, in the way that parents bring their children into being or the earth, sun and rain bring the oak tree out of the acorn.  If everything depends on efficient causes to bring them into being, again there is a chain of causation which requires explanation.  The chain cannot be infinite, because if there was no first efficient cause there would be no subsequent causes and the universe would not exist.  Something cannot come out of or be caused by nothing. Similarly, there cannot be a first efficient cause like other things in the universe, as if there were it would need efficient causes of its own and could not, therefore, be the first.  Aquinas concludes, “it is necessary to admit a first efficient cause, to which everyone gives the name of God.” Again, Aquinas’ second Cosmological Argument provides strong support for the existence of an uncaused efficient cause and again, it is a step too far to claim that this must be the God of Christian worship.  This not least because efficient causes do not need to be sustaining causes in esse (as Frederick Copleston later called them) but could be a cause in fieri (again, to use Copleston’s terminology).   An uncaused cause which began the universe but has no further role in it is not the God of Christian theism; at most it supports deism.  Further, Aquinas admits that

“There is no case known (neither is it, indeed, possible) in which a thing is found to be the efficient cause of itself; for so it would be PRIOR to itself, which is impossible.”

 This implies that as efficient cause the uncaused cause must be PRIOR to the universe, something which would be difficult to reconcile with Big Bang Theory as this suggests that as time itself was created at the Big Bang, it makes no sense to speak of anything being PRIOR to it or indeed, as Stephen Hawking observed, causing it.  In these ways, Aquinas goes beyond the evidence in claiming that the uncaused cause is that to “everyone gives the name of God”.

Aquinas’ third way develops the idea of the contingency of things in the universe, pointing out that everthing has the potential to be or not to be; “We find in nature things that are possible to be and not to be”.  In an infinite universe, all potentials not to be might be expected to have been realized; as something can’t come out of nothing, nothing would then exist and I could not be writing this essay.  It follows, therefore, that EITHER the universe cannot be infinite – in which case there would have to be a first cause in time which would be what everybody calls God – or the universe is infinite and there exists a “necessary being”, a fully actual “neither something nor nothing” which contains its own explanation and has no potential not to exist.  This, Aquinas claims, is what “all men speak of as God.”  Aquinas’ third Cosmological Argument is just as problematic as an argument for the existence of the God of Christian worship as the first and second.  Not only as an a posteriori argument does it stop short of providing proof, it also goes well beyond the observable evidence in concluding that the necessary being is God as Christians would define Him.  Leibniz later recast the third Cosmological Argument as an a priori argument, writing:

“Why is there something rather than nothing? The sufficient reason […] is found in a substance which […] is a necessary being bearing the reason for its existence within itself.” 

For Leibniz, anything that exists has a cause for its existence, either in the necessity of its own nature or in an external cause.  If the universe has an external cause for its existence, this cause must be God.  As the universe exists, it must have a cause for its existence, either in the necessity of its own nature or in an external cause.  Because the universe exists contingently, not necessarily, the universe must have an external cause and this must be God.  Nevertheless, like Aquinas, Leibniz argument fails to prove the existence of the God of Christian worship.  Causing the universe is not enough to be called God; the Christian God does rather more than an abstract singularity or the Higgs Boson does.  Further, it doesn’t make sense to predicate much of what the Christian God does to the necessary cause of the universe supported by Aquinas and by Leibniz in his supposed improvement of Aquinas’ third cosmological argument.  Both the God of Aquinas and the God of Leibniz are timelessly impassive and it is inconceivable how such a being could act even once to create the world, given that this would involve a change in its being incompatible with being timeless and fully actual with no potential.  Further, as Immanuel Kant observed, we have no experience of necessary beings so it makes little sense to speculate about their possible existence.  Also, it is inconsistent to start an argument by claiming that all things are contingent and conclude by hypothesizing something that is not contingent.  Again, while Aquinas’ third Cosmological Argument strongly points towards the existence of a necessary being or beings in the universe, it is far from being conclusive proof of such, even when recast as an a priori argument and cannot in any case justifiably claim that the necessary being is what Christians worship as God.

While it is true that most of the classical criticisms of Aquinas presented by David Hume and Bertrand Russell fail to undermine his Cosmological Arguments, the point (which they all make) about the Cosmological Argument failing to support the God of Christian worship stands.

Firstly, Hume criticized a version of the Cosmological Argument presented by his character Demea in Dialogues Concerning Natural Religion (1779) Book IX.  Cleanthes points out that there is no support for the claim that everything in the universe is moves and is moved, caused and is caused or is contingent.  We have a limited view of the universe and no sensible reason to believe that the universe is homogenous or that we see things the way they actually are, a principle known in science as isotropy.  For all we know, argues Cleanthes, there could be unmoved movers, uncaused causes or necessary beings within the universe which could explain its continued existence.  Nevertheless, accepting these criticisms of the Cosmological Argument entails abandoning Natural Science altogether.  Leibniz coined the term “Cosmological Principle” to refer to the principles of homogeneity and isotropy which all scientists must assume in order to reason inductively towards natural laws.  Without the Cosmological Principle, we could not make many scientific knowledge claims; Cosmology and Quantum Science, Medicine and Biochemistry would all be a waste of time.  In practice, laws of nature supported by inductive reasoning enable mobile phones and space shuttles to work, so it doesn’t make sense to doubt the authority of our observations as Hume, through Cleanthes, does.  These criticisms of Hume’s fail to undermine Aquinas’ Cosmological Arguments insofar as they point to a necessary cause for the universe.

Secondly, Cleanthes continues by criticizing the claim that just because the parts of the universe have causes, so must the universe as a whole.  Demea (and Aquinas) rely on the so-called fallacy of composition.   Further, Cleanthes asks why the universe cannot be the explanation of itself, why there must be an external cause for the universe.  Later, Bertrand Russell asked why the universe cannot be a “brute fact”.  Yet neither of these criticisms is conclusive.  As Leibniz points out, it is difficult to see how a universe of contingencies can itself exist necessarily.  Contingencies involve potential which cannot, by definition, exist within a necessary being.  Further, while characteristics of the parts do not necessarily have to be characteristics of the whole and while (as Russell argued) just because all men have mothers it doesn’t mean that the human race has a mother, it can sometimes follow.  Each strand of spaghetti has two ends, something which also applies to the whole packet of spaghetti.  In a sense and because it is made up of material in the way that things in the universe are, the universe is a thing.  Things exist contingently and need to be moved and caused by things other than themselves.  These criticisms of Hume’s fail to undermine Aquinas’ Cosmological Arguments insofar as they point to a necessary cause for the universe as well.

Nevertheless, Cleanthes’ criticism that the cause of the universe could not be said to have the attributes of the Christian God is, for reasons previously explored, is persuasive.  Again it is clear that while Aquinas’ Cosmological Arguments do offer support to the hypothesis that there is an uncaused, necessary cause for the universe, they are far from proving that the God of Christian worship exists. 

In conclusion, Aquinas’ Cosmological fail to prove that God exists, both because as a posteriori arguments they stop short of proving their conclusions and because even if they are reframed into a format which could provide proof, as Leibniz attempted, they demonstrate only the existence of an abstract necessary being far short of having the attributes of the God Christians worship. 

 

Bibliography

  • Class notes on the Cosmological Argument
  • Aristotle, Physics Book V
  • Aquinas, Summa Theologica 1, 2, 3
  • Hume’s Dialogues Concerning Natural Religion Book IX
  • Vardy & Vardy “God Matters” Chapters 4 & 5