Luke 22:41

But what meaneth His bending of knees? of which it is said, And he kneeled down, and prayed. It is the way of men to pray to their superiors with their faces on the ground, testifying by the action that the greater of the two are those who are asked. Now it is plain that human nature contains nothing worthy of God's imitation. Accordingly the tokens of respect which we evince to one another, confessing ourselves to be inferior to our neighbours, we have transferred to the humiliation of the Incomparable Nature. And thus He who bore our sicknesses and interceded for us, bent His knee in prayer, by reason of the man which He assumed, giving us an example, that we ought not to exalt ourselves at the time of prayer, but in all things be conformed to humility; for God resisteth the proud, but giveth grace to the humble. (James 4:6, 1 Pet. 5:5.)

(de Qu. Evang. lib. ii. qu. 50.) He was torn from them about a stone's cast, as though He would typically remind them that to Him they should point the stone, that is, up to Him bring the intention of the law which was written on stone.

But not to do good by words only, He went forward a little and prayed; as it follows, And he was withdrawn from them about a stone's cast. You will every where find Him praying apart, to teach you that with a devout mind and quiet heart we should speak with the most high God. He did not betake Himself to prayer, as if He was in want of another's help, who is the Almighty power of the Father, but that we may learn not to slumber in temptation, but rather to be instant in prayer.

He also alone prays for all, who was to suffer alone for all, signifying that His prayer is as far distant from ours as His Passion.

Now every art is set forth by the words and works of him who teacheth it. Because then our Lord had come to teach no ordinary virtue, therefore He speaks and does the same things. And so having in words commanded to pray, lest they enter into temptation, He does the same likewise in work, saying, Father, if thou be willing, remove this cup from me. He saith not the words, If thou wilt, as if ignorant whether it was pleasing to the Father. For such knowledge was not more difficult than the knowledge of His Father's substance, which He alone clearly knew, according to John, As the Father knoweth me, even so have I known the Father. (John 10:15.) Nor says He this, as refusing His Passion. For He who rebuked a disciple, who wished to prevent His Passion, (Matt. 16:23.) so as even after many commendations, to call him Satan, how should He be unwilling to be crucified? Consider then why it was so said. How great a thing was it to hear that the unspeakable God, who passes all understanding, was content to enter the virgin's womb, to suck her milk, and to undergo every thing human. Since then that was almost incredible which was about to happen, He sent first indeed Prophets to announce it, afterwards He Himself comes clothed in the flesh, so that you could not suppose Him to be a phantom. He permits His flesh to endure all natural infirmities, to hunger, to thirst, to sleep, to labour, to be afflicted, to be tormented; on this account likewise He refuses not death, that He might manifest thereby His true humanity.