Psalms 35:13

"But I, when they troubled me, clothed myself with sackcloth, and humbled my soul with fasting, and my prayer shall return into my own bosom" [Psalm 35:13]...Brethren, if for some little space with pious curiosity we lift the veil, and search with the intent eye of the heart the inner part of this Scripture, we find that even this the Lord did. Sackcloth, haply He calls His mortal flesh. Wherefore Sackcloth? For the likeness of sinful flesh. For the Apostle says, "God sent His Son in the likeness of sinful flesh, that through sin He might condemn sin in the flesh:" [Romans 8:3] that is, He clothed His Own Son with sackcloth, that through sackcloth He might condemn the goats. Not that there was sin, I say not in the Word of God, but not even in that Holy Soul and Mind of a Man, which the Word and Wisdom of God had so joined to Himself as to be One Person. Nay, nor even in His very Body was any sin, but the likeness of sinful flesh there was in the Lord; because death is not but by sin, [Romans 5:12] and surely that Body was mortal. For had It not been mortal, It had not died; had It not died, It had not risen again; had It not risen again, It had not showed us an example of eternal life. So then death, which is caused by sin, is called sin; as we say the Greek tongue, the Latin tongue, meaning not the very member of flesh, but that which is done by the member of flesh. For the tongue in our members is one among others, as the eyes, nose, ears, and the rest: but the Greek tongue is Greek words, not that the tongue is words, but that words are by the tongue....So then the sin of the Lord is that which was caused by sin; because He assumed flesh, of the same lump which had deserved death by sin. For to speak more briefly, Mary who was of Adam died for sin, Adam died for sin, and the Flesh of the Lord which was of Mary died to put away sin. With this sackcloth the Lord clothed Himself, and therefore was He not known, because He lay hid under sackcloth. "When they," says He, "troubled Me, I clothed Myself with sackcloth:" that is, they raged, I lay hid. For had He not willed to lie hidden neither could He have died, since in one moment of time one drop only of His Power, if indeed it is to be called a drop, He put forth, when they wished to seize Him, and at His one question, "Whom do you seek?" they all went back and fell to the ground. [John 18:4, 6] Such power could He not have humbled in passion, if He had not lain hid under sackcloth.