How then was {the Word} everywhere before making the world and, when He had made it, how was He shining in it without the world comprehending Him? (cf Jn 1:1-15). Pay careful attention: God "Who is everywhere present and fills all things" was not, Scripture says, separated from it by location when He created this sensible world, but by the nature of the glory of His divinity, it being evident that nothing created approached or comprehended Him at all. Indeed, being inseparable from all He is as clearly in all.

(Saint Symeon the New Theologian)