Tractates on the Gospel of John

¹¹ Turn your thoughts now to what we said had to be deferred, that it may now, if possible, be opened. Concerning this very resurrection He immediately subjoined, “For as the Father has life in Himself, even so has He given to the Son to have life in Himself.” What means that, “The Father has life in Himself”? Not elsewhere has He life but in Himself. His living, in fact, is in Him, not from elsewhere, nor derived from another. He does not, as it were, borrow life, nor, as it were, become a partaker of life, of a life which is not what Himself is: but “has life in Himself,” so that the very life is to Him His very self.

If I should be able yet further in some small measure to speak from this matter, by proposing examples for informing your understanding, will depend on God's help and the piety of your attention. God lives, and the soul also lives; but the life of God is unchangeable, the life of the soul is changeable. In God is neither increase nor decrease; but He is the same always in Himself, is ever as He is: not in one way now, in another way hereafter, in some other way before. But the life of the soul is exceedingly various: it lived foolish, it lives wise; it lived unrighteous, it lives righteous; now remembers, now forgets; now learns, now cannot learn; now loses what it had learned, now apprehends what it had lost.

The life of the soul is changeable. And when the soul lives in unrighteousness, that is its death; when again it becomes righteous, it becomes partaker of another life, which is not what itself is, inasmuch as by rising up to God, and cleaving to God, of Him it is justified. For it is said, “To him that believes in Him that justifies the ungodly, his faith is counted for righteousness.” By forsaking God, it becomes unrighteous; by coming to Him, it is made righteous. Does it not seem to you as it were something cold, which, when brought near the fire, grows warm; when removed from the fire, grows cold?

A something dark, which, brought near the light, grows bright; when removed from the light, grows dark? Something such is the soul: God is not any such thing. Moreover, man may say that he has light now in his eyes. Let your eyes say then, if they can, as by a voice of their own, “We have light in ourselves.” I answer: Not correctly do you say that you have light in yourselves: you have light, but in the heavens; you have light, but in the moon, in candles, if it happen to be night, not in yourselves: for, being shut, you lose what you perceive when open.

Not in yourselves have you light; keep the light if you can when the sun is set: 'tis night, enjoy the light of night; keep the light when the candle is withdrawn; but since you remain in darkness when the candle is withdrawn, you have not light in yourselves. Consequently, to have light in oneself is not to need light from another. Behold, whoso understands wherein He shows that the Son is equal with the Father, when He says, “As the Father has life in Himself, so has He given to the Son also to have life in Himself;” that there may be only this difference between the Father and the Son, that the Father has life in Himself, which none gave Him, while the Son has life in Himself which the Father gave.