We use the word “conscience” every day, but rarely stop to think about what it really means.  In broad terms, it usually refers to our inner moral compass, yet it can also refer to the voice of God within us, reason, how we apply our moral principles, our moral framework or even the internalised voices of our parents within our subconscious mind. Because of this, and because the arguments of those who have attempted to define the conscience as a specific thing are not persuasive, it is best to understand conscience as an umbrella term for various factors in moral decision-making.

Firstly, in the Bible various different words are used to refer to and sometimes translated as conscience.  In the Old Testament, the Hebrew word “lev” for heart suggests that there is an inner moral guide.  For example, “David’s heart condemned him after he had numbered the people. So David said to the LORD “I have sinned greatly in what I have done…” 2 Samuel 24:10 It was not until the rabbinic period that the Hebrew word matzpun referred to conscience. Etymologically it means “hidden north”, giving the suggestion of an inner moral compass. In the New Testament the Greek word syneídēsis means the capacity to apply general principles of moral judgment to particular cases.  The word is used frequently by St Paul, for example in Romans Chapter 2 “when Gentiles, who do not have the law, do by nature things required by the law, they are a law for themselves, even though they do not have the law. They show that the requirements of the law are written on their hearts, their consciences also bearing witness, and their thoughts sometimes accusing them and at other times even defending them.” After the 4th Century AD the Greek word Synderesis / Synteresis started to be used in commentaries on both Old and New Testaments. The word synderesis is by most scholars reckoned to be a corruption of the Greek word syneidêsis (συνείδησις).  On the other hand, also in the New Testament, St Paul speaks of those whose consciences have become “seared with a hot iron,” 1 Timothy 4:2 meaning they no longer feel guilt for sin. Conversely, a “good” or “clear” conscience is seen as one that is aligned with God’s will (1 Timothy 1:5). In 1 Peter 3:16, Peter encourages Christians to maintain a clear conscience, so that they may stand firm in their faith and defend it with integrity when challenged. These references suggest that conscience is a distinct faculty that all human beings have.  Given that the Bible uses different words for conscience and implies that it is God’s law, an inner moral guide or compass, the capacity to apply general principles to specific cases, our moral character and a faculty which can be corrupted, it seems that the word conscience is not a single thing, but best understood as an umbrella term for various factors involved in moral decision making.

Secondly, following the Bible, different Christian scholars have used the word conscience to refer to different things. For example, Aquinas uses three different words to distinguish between three things people usually use the word conscience for; Ratio, Synderesis and Conscientia.  For Aquinas, the God-given and rational part of conscience is called RATIO, it commands us to pursue good and avoid evil and cannot be wrong. For Kant, this is reason itself, issuing us with Categorical Imperatives which we must choose to follow.  For St Augustine, Butler and Newman this is conscience as the “voice of God” speaking through our minds and calling us to do what is right, which they admit is not always the same as what is rational. For Aquinas also, the conscience is not a synonym for reason but also refers to a specific habit of reason that tries to work out what good and evil consist in. This practical part of reason (what Aristotle called Phronesis) is known as SYNDERESIS and it requires formation, moving from offering only the most general guidance towards being more and more specific.  While it is a duty to follow the guidance of synderesis, which is after all part of Ratio which cannot be wrong, because its guidance may be too general to be useful it might mislead us, such as leading us to pursue an apparent good and not a real good. In addition, for Aquinas, another part of conscience is CONSCIENTIA, the act of applying synderesis-guidance to specific situations.  This is what Fletcher refers to as conscience, defining it as a verb not a noun.  This shows that scholars use the word conscience to refer to the faculty of reason, the voice of God, the habit of practical reason and the act of applying moral rules to a specific situation… and that conscience is not a single thing, but best understood as an umbrella term for various factors involved in moral decision making.

Thirdly, psychologists have a variety of ideas about what the conscience consists in, that are independent of the Bible and based on scientific observations. While his methodology was criticised by Popper as pseudo-scientific, Freud saw conscience as part of the super-ego, part of the subconscious mind that represents internalised voices of our parents, societal norms, religious beliefs and moral ideals. Conscience is formed during early childhood, particularly through the oral, anal and phallic phases of psycho-sexual development, suggesting that while conscience is a specific part of the psyche, it is made up of the values of our parents or care-givers as influenced by repressed experiences in different ways, explaining why peoples’ consciences seem to guide them in different directions that are not always rational or consistent with prevailing social norms. Freud’s ideas influenced other psychologists, whose methodologies are more credible, again seeking to explain how consciences develop through childhood and differ between adults.  For Piaget, consciences develop from being heteronomous in early childhood to being autonomous during the teenage years, and developmental disorders therefore explain why some adults lack a moral conscience, why others have a strong sense of the conscience being like a moral compass pointing towards fixed rules and still others see it as a more flexible and situational process of decision-making.  Similarly, for Fromm conscience usually develops from being authoritarian into being more humanistic, but some people fail to develop leaving them with an authoritarian conscience into adulthood and conforming to rules imposed on them from outside without really engaging reason. This explains how totalitarian regimes sometimes succeed, and why there will always be those who oppose them on humanistic grounds.  Finally, Kohlberg built on the ideas of Piaget and Fromm to suggest that conscience continues to develop in adulthood for some, towards a post-conventional level which at Stage 6 involves the conscience being reason, applying universal moral rules. Kohlberg explains why some peoples’ consciences demand that they follow rational deontological ethics, while others suggest they should be more situational and relativistic in their decision-making while others still command them to conform with social norms. While Freud, Piaget, Fromm and Kohlberg suggest that there is a specific thing called the conscience, they stress how it develops and changes, giving guidance of different sorts.  They also have slightly different ideas of conscience from each other.  This also suggests that conscience is not a single thing, but best understood as an umbrella term for various factors involved in moral decision making.

In conclusion, the word conscience is not a single thing, but best understood as an umbrella term for various factors involved in moral decision making. From a Christian perspective, Friedrich Schleiermacher, a German theologian and philosopher, agreed with this, viewing conscience as an umbrella term that integrates various factors of moral self-awareness. From a social-scientific perspective Carol Gilligan (b.1936) in “A Different Voice” (1982) argued that conscience is an umbrella term that includes different moral orientations depending on one’s ethical approach (e.g., care ethics versus justice ethics). She suggested that the conscience is influenced by not just reasoning, but also empathy, relational dynamics, and the emotional ties that influence moral judgment.  Whether one is approaching conscience from a religious or non-religious perspective, seeing it as an umbrella term for various factors involved in moral decision making is the most credible approach.