On first sight, Aquinas and Wittgenstein offer diametrically opposed approaches to defining meaning in religious language. Aquinas argued for a cognitivist understanding of religious language, with claims such as “god is good” being meaningful because they refer to the goodness of God which is analogical to goodness in created things, both in the sense of proportion and attribution. Wittgenstein seemed to argue for a non-cognitivist approach to religious language, with claims such as “God is good” being meaningful only if they cohere with the rules of the language game being played within the form of life or context within which the statement is made. On this level, it is Wittgenstein who offers the more persuasive approach to defining meaning in religious language today. Nevertheless, as Herbert McCabe has pointed out, there is a common cause between Aquinas and Wittgenstein, and a greater degree of similarity between their approaches than is usually understood.
In the first place, Wittgenstein’s approach to religious language is more persuasive than that of Aquinas because he starts from where we are and provides an account of religious language which supports the meaningfulness of claims made by and within different religions which seem to be mutually exclusive. His approach does not depend on us having a belief in God, let alone the very particular concept of God which Aquinas assumes. For Aquinas, God is eternal in the sense of being outside time and space, meaning that all God’s attributes are simple and single and that the apparent difference between God’s goodness, power and knowledge is due to how we understand God from our limited, contingent perspective and not the result of any real division in God’s nature. When we say that “God is good” what we say is meaningful because the goodness of created things is analogical to the goodness of God. This is because “God is good” is consistent with the nature of God; being eternal God necessarily fulfils his nature and cannot fall short of it by any proportion, so contains no evil (privatio boni). Further, “God is good” is meaningful because the goodness of all created things depends on God, so the attribution of goodness in created things depends on the attribute of goodness in God, which is primary. Aquinas’ approach is more persuasive than straightforward univocal predication – such as when St Anselm, for all he accepts that God does not have a body, seems to assume that the meaning of terms like goodness mean pretty much the same when applied to God and to created things – because his approach affirms the “otherness” of God, which is consistent both with the Bible (Job 55) and with Natural Theology. Yet, Aquinas’ approach is rooted in a worldview which sees God’s existence as the creator and necessary sustainer as undeniable. For Aquinas, the fact that claims such as “God is good” mean any more than “God is fully God” or just “God is” depends on the being of God being understood to be primary, so that the being of other things can be understood to be secondary and take their attributes by attribution from His. Just as the meaningfulness of me saying “my yoghurt is healthy” depends on the primary existence of healthy people with whose lifestyles this yoghurt is conceivably consistent, so the meaningfulness of me saying “God is good” depends on the primary existence of God with whom my secondary concept of goodness – drawn from the partial goodness of contingent things – can have an analogical relationship. Aquinas himself admits that “because we do not know the essence of God, the proposition is not self-evident to us” Summa Theologica 1,2,1 and so rejects any attempt to prove God’s existence a priori, from reason alone, so his approach to religious language depends on the success of his Five Ways in demonstrating God’s existence a posteriori, from effects or observations. Yet Aquinas’ five ways have been widely criticized; his premises have been shown to be untrue so that they cannot support their conclusions – of a Prime Mover, Uncaused Causer, Necessary Being, Supreme Perfection and Intelligent Designer – let alone to their secondary conclusions, that “this is what everybody calls God.” While Aquinas’ failure to demonstrate the existence of God does not mean that God does not exist, or is not just as Aquinas reasoned He must be, Wittgenstein is surely right when he suggests that the meaning of words depends on how they are used and not on what they refer to; the meaning of words changes over time and differs by context. Given this and the impossibility of establishing the existence of let alone verifying the nature of a Godly point of reference for religious claims, the meaningfulness of a religious claim must depend on the context within which it is made. It follows that for those who inhabit Aquinas’ language game and believe in his God, his approach to religious language will be persuasive, but today it is Wittgenstein’s approach which offers the more persuasive account of the meaningfulness of religious language as a whole.
Secondly, Wittgenstein’s approach to religious language is more persuasive than Aquinas’ because it allows us to say many more things about God meaningfully. Aquinas’ analogical approach supports us in saying a very limited range of things about God, and suggests that the meaning communicated when we affirm that “God is good” or “God is omnipotent” or “God has supreme knowledge” is much, much less than most believers assume it to be. While Ian Ramsey was right to suggest that religious people use qualifiers such as “timeless” or “divine” to signify that their claims are religious, rely on models and so are “logically odd,” this practice is not so widespread as Ramsey suggests. Most believers – even within Aquinas’ Roman Catholic form of life – assume that God’s goodness is much more like our goodness than Aquinas’ doctrine of analogy would allow, so in practice they are speaking of God univocally, which cannot be meaningful given God’s timeless, wholly simple nature. By contrast, Wittgenstein’s approach to religious language supports believers and churches in making whatever claims cohere with the rules of the language game… that they contribute to setting up. Neither the game nor its rules are fixed and static, which suggests that religions can evolve and change over time and accommodate diversity within their ranks as well. This account of religious language is persuasive because it is more consistent with how religion is in the world today than Aquinas fixed, analogical approach. Within Roman Catholicism the claim “God is mother” is highly controversial and would be rejected by most mainstream believers, but that does not stop it being meaningful within some communities. Similarly, the claim that all Catholics have a duty to give the poor a “preferential option” is the life-force of base-communities in South America, while other communities to the north pay lip-service to the idea, if that. Wittgenstein’s approach to religious language is persuasive because it accounts for this diversity and the dynamics of religious meaning much better than Aquinas’ narrow, cerebral approach.
Nevertheless, as Herbert McCabe pointed out, there was common cause between Aquinas and Wittgenstein, which is often ignored. There is no evidence that Wittgenstein read Aquinas directly, but he had several prominent Catholic students, including Elizabeth Anscombe and Peter Geach, who arranged a Catholic funeral and burial for their teacher despite his never joining the Church. While the two lived 700 years apart and in very different contexts, there is in both Aquinas an in Wittgenstein a need to understand the very nature of language. There is also a concern to define the limits of language and not to say either what is untrue or not meaningful. Famously, Wittgenstein concluded his Tractatus Logico-Philosophicus (1921) by writing “what we cannot speak about, we must pass over in silence” suggesting that he had great sympathy for the apophatic approach to language. Ranjit Chatterjee in Wittgenstein and Judaism: A Triumph of Concealment (2005) argues that Wittgenstein must have read Maimonides’ “The Guide for the Perplexed,” not least because he used a number of phrases and metaphors also used by Maimonides. Wittgenstein clearly believed that there is an ultimate, metaphysical reality, but rejected the idea that we can speak about it meaningfully. He wrote “There is indeed the inexpressible. This shows itself; it is the mystical.” Tractatus 6:522 and “How the world is, is completely indifferent for what is higher. God does not reveal himself in the world.” Tractatus 6:4321 meaning that for Wittgenstein it is not possible to speak (meaningfully) about God, but that does not stop us from feeling God. He wrote “The feeling of the world as a limited whole is the mystical feeling.” 6:45 In this way, Aquinas was more positive about our ability to speak meaningfully about ultimate reality than Wittgenstein. Aquinas maintained that “we know God from creatures as their principle, and also by way of excellence and remotion. In this way therefore He can be named by us from creatures, yet not so that the name which signifies Him expresses the divine essence in itself.” Summa Theologica 1, 13, 1 And yet, Aquinas felt much sympathy for Maimonides position, which held that “The corporeal element in man is a large screen and partition that prevents him from perfectly perceiving abstract ideals… However great the exertion of our mind may be to comprehend the Divine Being or any of the ideals, we find a screen and partition between God and us.” Guide to the Perplexed Part 3, Book 9 and thus for what became Wittgenstein’s position. He wrote “Univocal predication is impossible between God and creatures.” Summa Theologica 1, 13, 5 and, while he maintained that the creative relationship between God and creatures supported his analogical approach to language, he was always cautious of taking claims about God too literally and forgetting the essential difference between what it means for us to be good and for God to be good. Yet, for Aquinas, the meaningfulness of religious claims depends ultimately on the belief that God is the cause of creatures, which means that God is not as remote as it otherwise might seem (Summa 1,13,2) As I have previously argued, Aquinas’ attempt to demonstrate God’s existence fails. Further, Aquinas’ religious experience towards the end of his life shows that he realized that himself in the end. It follows that Aquinas basis for believing that God is the cause of creatures is faith and not reason, so the meaningfulness of claims depends on faith and has no firm epistemological foundation. Other than that God is the cause of creatures, the meaningfulness of religious claims for Aquinas depends on how they cohere with points of doctrine and what else is known to be true. As Aaron B James pointed out in a 2009 article for Catalyst Magazine, Aquinas was a Theologian at least as much as he was a Philosopher. Similarly, for Wittgenstein, the meaning of religious claims depends on coherence, although that does not mean there is not an ultimate truth at stake. As he said, “let nature speak & acknowledge only one thing higher…” Culture and Value p3. He also said “If one thinks of God as the creator, must the conservation of the universe not be a miracle as great as creation – yes, aren’t the two one and the same? Public and Private Occasions p215 which suggests that Wittgenstein’s concept of God and Aquinas’ were similar. This is supported by William H Brenner in “Theology as Straw: An Essay on Wittgenstein and Aquinas” (New Blackfriars Vol. 93, No. 1046 (JULY 2012), pp. 412-425) In these ways, Aquinas and Wittgenstein are more similar than many would recognize, and yet this is partly because Aquinas’ attempt to root his approach to religious language in epistemological foundations failed, so in the end it is Wittgenstein’s approach to religious language which remains the more persuasive.
In conclusion, Wittgenstein’s approach to defining meaning in religious language is more persuasive than that of Aquinas, but it is worth looking beyond the superficial contrasts between their approaches to the essential similarities between their worldviews. While Aquinas and Wittgenstein were separated by 700 years, most of a continent, by religion and by culture, they both based their life on the existence of an metaphysical truth which we can only experience and can never know, at least within the limits of this life.