5 Strong-minded, indeed, are those Christians, if such there are, who experience no trouble at all in the prospect of death; but for all that, are they stronger-minded than Christ? Who would have the madness to say so? And what else, then, does His being troubled signify, but that, by voluntarily assuming the likeness of their weakness, He comforted the weak members in His own body, that is, in His Church; to the end that, if any of His own are still troubled at the approach of death, they may fix their gaze upon Him, and so be kept from thinking themselves castaways on this account, and being swallowed up in the more grievous death of despair?
And how great, then, must be that good which we ought to expect and hope for in the participation of His divine nature, whose very perturbation tranquillizes us, and whose infirmity confirms us? Whether, therefore, on this occasion it was by His pity for Judas himself thus rushing into ruin, or by the near approach of His own death, that He was troubled, yet there is no possibility of doubting that it was not through any infirmity of mind, but in the fullness of power, that He was troubled, and so no despair of salvation need arise in our minds, when we are troubled, not in the possession of power, but in the midst of our weakness.
He certainly bore the infirmity of the flesh—an infirmity which was swallowed up in His resurrection. But He who was not only man, but God also, surpassed by an ineffable distance the whole human race in fortitude of mind. He was not, then, troubled by any outward plessure of man, but troubled Himself; which was very plainly declared of Him when He raised Lazarus from the dead: for it is there written that He troubled Himself, that it may be so understood even where the text does not so express it, and yet declares that He was troubled. For having by His power assumed our full humanity, by that very power He awoke in Himself our human feelings whenever He judged it becoming.
Source: Tractates on the Gospel of John (New Advent)