St. Gregory the Theologian on the Nature of God

The Three Holy Hierarchs - Sts. Basil the Great, John Chrysostom and Gregory the Theologian

God always was, and always is, and always will be. Or rather, God always Is. For Was and Will be are fragments of our time, and of changeable nature, but He is Eternal Being. And this is the Name that He gives to Himself when giving the Oracle to Moses in the Mount. For in Himself He sums up and contains all Being, having neither beginning in the past nor end in the future; like some great Sea of Being, limitless and unbounded, transcending all conception of time and nature, only adumbrated by the mind, and that very dimly and scantily, not by His Essentials, but by His Environment; one image being got from one source and another from another, and combined into some sort of presentation of the truth, which escapes us before we have caught it, and takes to flight before we have conceived it, blazing forth upon our Master-part, even when that is cleansed, as the lightning flash which will not stay its course, does upon our sight.

In order as I conceive by that part of it which we can comprehend to draw us to itself (for that which is altogether incomprehensible is outside the bounds of hope, and not within the compass of endeavor), and by that part of It which we cannot comprehend to move our wonder, and as an object of wonder to become more an object of desire, and being desired to purify, and by purifying to make us like God; so that when we have thus become like Himself, God may, to use a bold expression, hold converse with us as Gods, being united to us, and that perhaps to the same extent as He already knows those who are known to Him. The Divine Nature then is boundless and hard to understand; and all that we can comprehend of Him is His boundlessness; even though one may conceive that because He is of a simple nature He is therefore either wholly incomprehensible, or perfectly comprehensible. For let us further inquire what is implied by “is of a simple nature.” For it is quite certain that this simplicity is not itself its nature, just as composition is not by itself the essence of compound beings.

And when Infinity is considered from two points of view, beginning and end (for that which is beyond these and not limited by them is Infinity), when the mind looks to the depth above, not having where to stand, and leans upon phenomena to form an idea of God, it calls the Infinite and Unapproachable which it finds there by the name of Unoriginate. And when it looks into the depths below, and at the future, it calls Him Undying and Imperishable. And when it draws a conclusion from the whole it calls Him Eternal. For Eternity is neither time nor part of time; for it cannot be measured. But what time, measured by the course of the sun, is to us, that Eternity is to the Everlasting, namely, a sort of time-like movement and interval co-extensive with their existence.

*Taken from the Speech on Theophany.