15 If then, Brethren, we are not able to see what the “Seeing” of the Word is, whither are we going? What Vision it may be with too great haste are we requiring? Why are we wishing to have shown us what we are not able to see? These things accordingly are spoken of which we desire to see, not as what we are able already to comprehend. For if you see the “Seeing” of the Word, perhaps in that you see the “Seeing” of the Word, you will see the Word Himself; that the Word may not be one thing, the “Seeing” of the Word another, lest there be Therein anything joined, and coupled, and double, and compacted.
For It is something Simple, of a Simplicity ineffable. Not as with a man, the man is one thing, the man's seeing another. For sometimes a man's seeing is extinguished, and the man remains. This it is of which I said that I was about to say something which all would not be able to understand; the Lord even grant that some may have understood. My Brethren, to this end does He exhort us, that we may see, that the “Seeing” of the Word is beyond our powers; for they are small; be they nourished, perfected.
Whereby? By the commandments. What commandments? “He that loves Me, keeps My commandments.” What commandments? For already do we wish to increase, to be strengthened, perfected, that we may see the “Seeing” of the Word. Tell us, Lord, now what commandments? “A new commandment I give unto you, that you love one another.” This charity then, Brethren, let us draw from the plentifulness of the Fountain, let us receive it; be nourished by it. Receive that whereby you may be able to receive.
Let charity give you birth, let charity nourish you; charity bring you to perfection, charity strengthen you; that you may see this “Seeing” of the Word, that the Word is not one thing and His “Seeing” another, but that the “Seeing” of the Word is the Very Word Himself; and so perhaps you will soon understand that that which is said, “The Son can do nothing of Himself, but what He sees the Father do,” is as if He had said, “The Son would not be, if He had not been born of the Father.” Let this suffice, Brethren; I know that I have said that which perhaps, if meditated upon, may develop itself to many, which oftentimes when expressed in words may chance to be obscured.
Source: Sermons on Selected Lessons of the New Testament (New Advent)