15 I wish to say something further, and here ask sincerely both for your more earnest attention, and your devotion to Godward. For none but bodies are held or contained in places suited to the nature of bodies. The Divinity is beyond all such places: let no one seek for it as though it were in space. It is everywhere invisible and inseparably present; not in one part greater, and another smaller; but whole everywhere, and nowhere divided. Who can see? Who can comprehend this?
Let us restrain ourselves: let us remember who we are; and of Whom we speak. Let this and that, or whatever appertains to the nature of God, be with a pious faith embraced, with a holy respect entertained, and as far as is allowed us, as far as is possible for us, in an unspeakable sort understood. Let words be hushed: let the tongue be silent, let the heart be aroused, let the heart be lifted up there. For it is not of such a nature as that it can ascend into the heart of man; but the heart of man must itself ascend to it.
Let us consider the creatures (“for the invisible things of Him from the creation of the world are clearly seen, being understood by the things that are made”), if haply in the things which God has made, with which we have some familiarity of intercourse, we may find some resemblance, whereby we may prove that there are some three things which may be exhibited as three separably, yet whose operation is inseparable.
Source: Sermons on Selected Lessons of the New Testament (New Advent)