2 I hear Him saying a little before, “The hour comes that the Son of man should be glorified: if a grain of wheat die, it brings forth much fruit.” I hear this also, “He that hates his life in this world shall keep it unto life eternal.” Nor am I permitted merely to admire, but commanded to imitate, and so, by the words that follow, “If any man serve me, let him follow me; and where I am, there shall also my servant be,” I am all on fire to despise the world, and in my sight the whole of this life, however lengthened, becomes only a vapor; in comparison with my love for eternal things, all that is temporal has lost its value with me.
And now, again, it is my Lord Himself, who by such words has suddenly transported me from the weakness that was mine to the strength that was His, that I hear saying, “Now is my soul troubled.” What does it mean? How biddest Thou my soul follow You if I behold Your own troubled? How shall I endure what is felt to be heavy by strength so great? What is the kind of foundation I can seek if the Rock is giving way? But methinks I hear in my own thoughts the Lord giving me an answer, saying, You shall follow me the better, because it is to aid your power of endurance that I thus interpose.
You have heard, as addressed to yourself, the voice of my fortitude; hear in me the voice of your infirmity: I supply strength for your running, and I check not your hastening, but I transfer to myself your causes for trembling, and I pave the way for your marching along. O Lord our Mediator, God above us, man for us, I own Your mercy! For because Thou, who art so great, art troubled through the good will of Your love, Thou preservest, by the richness of Your comfort, the many in Your body who are troubled by the continual experience of their own weakness, from perishing utterly in their despair.
Source: Tractates on the Gospel of John (New Advent)