IV.  Therefore we must begin again thus.  It is difficult to conceive God but to define Him in words is an impossibility, as one of the Greek teachers of Divinity Plato, Tim., 28 E. taught, not unskilfully, as it appears to me; with the intention that he might be thought to have apprehended Him; in that he says it is a hard thing to do; and yet may escape being convicted of ignorance because of the impossibility of giving expression to the apprehension.  But in my opinion it is impossible to express Him, and yet more impossible to conceive Him.  For that which may be conceived may perhaps be made clear by language, if not fairly well, at any rate imperfectly, to any one who is not quite deprived of his hearing, or slothful of understanding.  But to comprehend the whole of so great a Subject as this is quite impossible and impracticable, not merely to the utterly careless and ignorant, but even to those who are highly exalted, and who love God, and in like manner to every created nature; seeing that the darkness of this world and the thick covering of the flesh is an obstacle to the full understanding of the truth.  I do not know whether it is the same with the higher natures and purer Intelligences No one doubts, say the Benedictine Editors, that the Angels do see God, and that men, too, will see Him, when they attain to Eternal Bliss.  S. Thomas (Summa I. qu. xii. 4) argues that the Angels have cognition of God’s Essence not by nature but by grace:  but yet (Ib. qu. lvi. 3) that they have by nature a certain cognition of Him, as represented and as it were mirrored in their own essence; though not the actual vision of His Essence.  The Angel, he says again (Ib. qu. lxiv. 1) has a higher cognition of God than man has, on account of the perfection of his intellect; and this cognition remains even in the fallen Angels. which because of their nearness to God, and because they are illumined with all His Light, may possibly see, if not the whole, at any rate more perfectly and distinctly than we do; some perhaps more, some less than others, in proportion to their rank.