But the error of these men, because it is very great, and tends to overthrow the condition of human life, must be refuted by us, lest you yourself also should be deceived, being incited by the authority of men who deem themselves wise. Nor, however, are we so arrogant as to boast that the truth is comprehended by our intellect; but we follow the teaching of God, who alone is able to know and to reveal secret things. But the philosophers, being destitute of this teaching, have imagined that the nature of things can be ascertained by conjecture. But this is impossible; because the mind of man, enclosed in the dark abode of the body, is far removed from the perception of truth: and in this the divine nature differs from the human, that ignorance is the property of the human, knowledge of the divine nature.
On which account we have need of some light to dispel the darkness by which the reflection of man is overspread, since, while we live in mortal flesh, we are unable to divine-by our senses. But the light of the human mind is God, and he who has known and admitted Him into his breast will acknowledge the mystery of the truth with an enlightened heart; but when God and heavenly instruction are removed, all things are full of errors. And Socrates, though he was the most learned of all the philosophers, yet, that he might prove the ignorance of the others, who thought that they possessed something, rightly said that he knew nothing, except one thing—that he knew nothing. For he understood that that learning had nothing certain, nothing true in itself; nor, as some imagine, did he pretend1 to learning that he might refute others, but he saw the truth in some measure. And he testified even on his trial (as is related by Plato) that there was no human wisdom. He so despised, derided, and cast aside the learning in which the philosophers then boasted, that he professed that very thing as the greatest learning, that he had learnt that he knew nothing. If, therefore, there is no human wisdom, as Socrates taught, as Plato handed down, it is evident that the knowledge of the truth is divine, and belongs to no other than to God. Therefore God must be known, in whom alone is the truth. He is the Parent of the world, and the Framer of all things; who is not seen with the eyes, and is scarcely distinguished by the mind; whose religion is accustomed to be attacked in many ways by those who have neither been able to attain true wisdom, nor to comprehend the system of the great and heavenly secret.