V. The resignation of Christ is an undying lesson to the Church
And so, dearly beloved, when the Son of God says, “Father, if it be possible, let this cup pass from Me,” He uses the outcry of our nature, and pleads the cause of human frailty and trembling: that our patience may be strengthened and our fears driven away in the things which we have to bear. At length, ceasing even to ask this now that He had in a measure palliated our weak fears, though it is not expedient for us to retain them, He passes into another mood, and says, “Nevertheless, not as I will but as You;” and again, “If this cup can not pass from Me, except I drink it, Your will be done.”
These words of the Head are the salvation of the whole Body: these words have instructed all the faithful, kindled the zeal of all the confessors, crowned all the martyrs. For who could overcome the world's hatred, the blasts of temptations, the terrors of persecutors, had not Christ, in the name of all and for all, said, to the Father, “Your will be done?” Then let the words be learned by all the Church's sons who have been purchased at so great a price, so freely justified: and when the shock of some violent temptation has fallen on them, let them use the aid of this potent prayer, that they may conquer their fear and trembling, and learn to suffer patiently.
From this point, dearly-beloved, our sermon must pass to the consideration of the details of the Lord's Passion, and lest we should burden you with prolixity, we will divide our common task, and put off the rest till the fourth day of the week. God's grace will be vouchsafed to you if you pray Him to give me the power of carrying out my duty: through our Lord Jesus Christ, etc.
Source: Sermons (New Advent)