1 After the Lord Jesus Christ, in the words of yesterday's lesson, had exhorted His servants to follow Him, and had predicted His own passion in this way, that unless a grain of wheat fall into the ground and die, it abides alone; but if it die, it brings forth much fruit; and also had stirred up those who wished to follow Him to the kingdom of heaven, to hate their life in this world if their thought was to keep it unto life eternal—He again toned down His own feelings to our infirmity and says, where our lesson today commenced, “Now is my soul troubled.”
Whence, Lord, was Your soul troubled? He had, indeed, said a little before, “He that hates his life [soul] in this world shall keep it unto life eternal.” Do you then love your life in this world, and is your soul troubled as the hour approaches when you shall leave this world? Who would dare affirm this of the soul [life] of the Lord? We rather it was whom He transferred unto Himself; He took us into His own person as our Head, and assumed the feelings of His members; and so it was not by any others He was troubled, but, as was said of Him when He raised Lazarus, “He was troubled in Himself.” For it behooved the one Mediator between God and men, the man Christ Jesus, just as He has lifted us up to the heights of heaven, to descend with us also into the lowest depths of suffering.
Source: Tractates on the Gospel of John (New Advent)