John 8:58

"Jesus saith unto them, Before Abraham was, I Am. Then took they up stones to cast at Him." Seest thou how He proved Himself to be greater than Abraham? For the man who rejoiced to see His day, and made this an object of earnest desire, plainly did so because it was a day that should be for a benefit, and belonging to one greater than himself. Because they had said, "The carpenter's son" and imagined nothing more concerning Him, He leadeth them by degrees to an exalted notion of Him. Therefore when they heard the words, "Ye know not God," they were not grieved; but when they heard, "before Abraham was, I Am," as though the nobility of their descent were debased, they became furious, and would have stoned Him.

But wherefore said He not, "Before Abraham was, I was," instead of "I Am"? As the Father useth this expression, "I Am," so also doth Christ; for it signifieth continuous Being, irrespective of all time. On which account the expression seemed to them to be blasphemous. Now if they could not bear the comparison with Abraham, although this was but a trifling one, had He continually made Himself equal to the Father, would they ever have ceased casting stones at Him?

(Tr. xliii. 18) Abraham being a creature, He did not say before Abraham was, but, before Abraham was made. Nor does He say, I am made; because that, in the beginning WAS. the Word.

The angry Jews replied, "Thou art not yet fifty years old, and hast thou seen Abraham?" And the Lord: "Verily, verily, I say unto you, Before Abraham was made, I am." Weigh the words, and get a knowledge of the mystery. "Before Abraham was made." Understand, that "was made" refers to human formation; but "am" to the Divine essence. "He was made," because Abraham was a creature. He did not say, Before Abraham was, I was; but, "Before Abraham was made," who was not made save by me, "I am." Nor did He say this, Before Abraham was made I was made; for "In the beginning God created the heaven and the earth;" and "in the beginning was the Word." "Before Abraham was made, I am." Recognize the Creator-distinguish the creature. He who spake was made the seed of Abraham; and that Abraham might be made, He Himself was before Abraham.

(ut sup.) Our Saviour mildly draws them away from their carnal view, to the contemplation of His Divinity; Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am. Before is a particle of past time, am, of present. Divinity has no past or future, but always the present; and therefore He does not say, Before Abraham was, I was: but, Before Abraham was, I am: (Exod. 3:14) as it is in Exodus, I am that I am. Before and after might be said of Abraham with reference to different periods of his life; to be, in the present, is said of the truth only.