On the question why certain Names in the Holy Scriptures are changed (11-15)

It was, therefore, quite consistent with reason that no proper name could with propriety be assigned to him who is in truth the living God. Do you not see that to the prophet who is really desirous of making an honest inquiry after the truth, and who asks what answer he is to give to those who question him as to the name of him who has sent him, he says, "I am that I am," [*] which is equivalent to saying, "It is my nature to be, not to be described by name:"

but in order that the human race may not be wholly destitute of any appellation which they may give to the most excellent of beings, I allow you to use the word Lord as a name; the Lord God of three natures—of instruction, and of holiness, and of the practise of virtue; of which Abraham, and Isaac, and Jacob are recorded as the symbols. For this, says he, is the everlasting name, as if it had been investigated and discerned in time as it exists in reference to us, and not in that time which was before all time; and it is also a memorial not placed beyond recollection or intelligence, and again it is addressed to persons who have been born, not to uncreated natures.

For these men have need of the complete use of the divine name who come to a created or mortal generation, in order that, if they cannot attain to the best thing, they may at least arrive at the best possible name, and arrange themselves in accordance with that; and the sacred oracle which is delivered as from the mouth of the Ruler of the universe, speaks of the proper name of God never having been revealed to any one, when God is represented as saying, "For I have not shown them my name;" [*] for by a slight change in the figure of speech here used, the meaning of what is said would be something of this kind: "My proper name I have not revealed to them," but only that which is commonly used, though with some misapplication, because of the reasons above-mentioned.

And, indeed, the living God is so completely indescribable, that even those powers which minister unto him do not [*] [*]

Therefore do not doubt either whether that which is more ancient than any existing thing is indescribable, when his very word is not to be mentioned by us according to its proper name. So that we must understand that the expression, "The Lord was seen by Abraham," [*] means not as if the Cause of all things had shone forth and become visible, (for what human mind is able to contain the greatness of his appearance?) but as if some one of the powers which surround him, that is to say, his kingly power, had presented itself to the sight, for the appellation Lord belongs to authority and sovereignty.