The construction {of the phrase âI believe in Godâ} is so familiar in English that, at first sight, it is hard to see why all the commentators, from Augustine onwards, should have been so preoccupied with the strange notion that, as Christians, we believe âinâ God. Augustineâs distinction between three Latin constructions - âcredere Deoâ, âcredere Deumâ, and âcredere in Deumâ - exercised a massive influence on later Christian thought. I shall accordingly take his account, and Aquinasâs interpretation of it, as my guide.
âCredere Deoâ, according to Augustine, is a matter of believing what God says or, as we would say, âbelieving Godâ. âCredere Deumâ is a matter of believing God to be God. Unfortunately, the most natural English rendering of this would be âbelieving in Godâ - Â taking this phrase to cover either one or both of: acknowledging that God exists and supposing that the God we speak of is, we might say, the only real God. In any of these senses of âbeliefâ, Augustine adds laconically, demons and evildoers may believe in God. It follows that âCredo in Deumâ, as it stands at the head of the Apostlesâ Creed, does not mean any of the things that we might most naturally take âI believe in Godâ to mean.
Faith, for Aquinas as for Augustine, is the way in which, in this life, we know God. (We may have some difficulty with this idea because, in modern English usage, we tend -on the basis of distinctions sharply drawn between âmerely believingâ things and knowing them- to keep faith and knowledge quite some way apart.) Aquinas takes up Augustineâs distinction, and suggests that God may be understood to be, in three ways, the âobjectâ of our faith. First, in the sense of what faith knows or has in mind; this is what it is âcredere Deumâ, to believe in God. Second, in the sense of the point of view from which faith knows whatever it knows (including God); this is what it is âcredere Deoâ, to believe God. Under the second head, in other words, face is considered as our response to what God says, to Godâs uttered Word
And the third sense? This is Augustineâs âcredere in Deumâ, under which heading God is the object of our faith as heartâs desire, as goal towards which all our life and thought it set, as (we might almost say) faithâs âobjectiveâ. One translator tries âbelieving unto Godâ, but this is an awkward and unfamiliar expression. Augustine says it better: âWhat is it, therefore, to believe in him [credere in eum]? It is in believing to love, in believing to delight, in believing to walk towards him, and be incorporated amongst the limbs or members of his body.â {...} Thus {t}o confess belief in God is to set all our life, our mind, our heart, in Godâs direction.