Nicene and Post-Nicene Fathers, Ser. II, Vol. IV:
Against the Heathen. (Contra Gentes.): §34. The soul, then, if only it get rid of the stains of sin is able to know God directly, its own rational nature imaging back the Word of God, after whose image it was created. But even if it cannot pierce the cloud which sin draws over its vision, it is confronted by the witness of creation to God.

§34. The soul, then, if only it get rid of the stains of sin is able to know God directly, its own rational nature imaging back the Word of God, after whose image it was created. But even if it cannot pierce the cloud which sin draws over its vision, it is confronted by the witness of creation to God.

We repeat then what we said before, that just as men denied God, and worship things without soul, so also in thinking they have not a rational soul, they receive at once the punishment of their folly, namely, to be reckoned among irrational creatures: and so, since as though from lack of a soul of their own they superstitiously worship soulless gods, they are worthy of pity and guidance. 2. But if they claim to have a soul, and pride themselves on the rational principle, and that rightly, why do they, as though they had no soul, venture to go against reason, and think not as they ought, but make themselves out higher even than the Deity? For having a soul that is immortal and invisible to them, they make a likeness of God in things visible and mortal. Or why, in like manner as they have departed from God, do they not betake themselves to Him again? For they are able, as they turned away their understanding from God, and feigned as gods things that were not, in like manner to ascend with the intelligence of their soul, and turn back to God again. 3. But turn back they can, if they lay aside the filth of all lust which they have put on, and wash it away persistently, until they have got rid of all the foreign matter that has affected their soul, and can shew it in its simplicity as it was made, that so they may be able by it to behold the Word of the Father after Whose likeness they were originally made. For the soul is made after the image and likeness of God, as divine Scripture also shews, when it says in the person of God 152 : “Let us make man after our Image and likeness.” Whence also when it gets rid of all the filth of sin which covers it and retains only the likeness of the Image in its purity, then surely this latter being thoroughly brightened, the soul beholds as in a mirror the Image of the Father, even the Word, and by His means reaches the idea of the Father, Whose Image the Saviour is. 4. Or, if the soul’s own teaching is insufficient, by reason of the external things which cloud its intelligence, and prevent its seeing what is higher, yet it is further possible to attain to the knowledge of God from the things which are seen, since Creation, as though in written characters, declares in a loud voice, by its order and harmony, its own Lord and Creator.

Footnotes

Gen. i. 26.