4 Take an example, very different in character and wholly inadequate, yet in some lit tle measure helpful to the understanding of God, from things that are in peculiarly intimate subjection to God. See here in my own case, while as far as pertains to my mind I am just the same as yourselves, if I keep silence I am so to myself; but if I speak to you something suited to your understanding, in a certain sense I go forth to you without leaving myself, but at the same time approach you and yet quit not the place from which I proceed.
But when I cease speaking, I return in a kind of way to myself, and in a kind of way I remain with you, if you retain what you have heard in the discourse I am delivering. And if the mere image that God made is capable of this, what may not God, the very image of God, not made by, but born of God; whose body, wherein He came forth to us and returned from us, has not ceased to be, like the sound of my voice, but abides there, where it shall die no more, and death shall have no more dominion over it? Much more, perhaps, might and ought to have been said on these words of the Gospel; but your souls ought not to be burdened with spiritual food, however pleasant, especially as the spirit is willing, but the flesh is weak.
Source: Tractates on the Gospel of John (New Advent)