Peter said unto him, Though I should die with you, yet will I not deny you. Likewise also said all the disciples.
All Commentaries on Matthew 26:35 Go To Matthew 26
Cornelius a Lapide
AD 1637
Peter saith unto Him, Though I should die with Thee, yea will I not deny Thee. Likewise also said they all. To testify their faith, affection, and love towards Him; but in their presumption they sinned in a twofold manner. Thou wilt say, The Apostles believed Christ to be the Son of God, why then did they not believe (nay, clamoured against) Him when He predicted their fall? Why, because they did not attend to Christ"s prediction, but looked rather to their then purpose of heart, which they felt to be so strong that it would be impossible for them to fall away. And consequently regarding Christ"s words not so much a prediction as a test and trial of their purpose and love, they thought that in this time of trial their affection towards Him should be boldly and resolutely manifested. "Peter," says S. Hilary, "was so carried forward by his affection and love for Christ, as to take no account of his own natural weakness, nor the belief he should have in the Lord"s words." But even though they believed Christ"s prediction, yet they were free to deny Him, because neither did the prediction itself nor their belief in it take away their liberty, but rather presupposed it. For Christ predicted their defection because they would certainly forsake Him; but they did not forsake Him because He foretold they would do so. Objectively their future defection was prior to Christ"s foreknowledge and prediction, for Christ only foresaw that which they would do as free agents, and accordingly imposed not on them any necessity of denying Him, since His prediction was objectively subsequent.
But thou wilt maintain, If Peter, believing Christ"s words, had persuaded himself that he would certainly deny Christ that very night, he could not have but done it; because this persuasion and belief would have determined his mind, and bound him to do so. For no one can effectually strive against that which he knows will certainly happen by his own agency. The attempt would be vain. He regards and shrinks from it as impossible; for he knows that this and nothing else would happen, whatever his efforts. But, I reply, this persuasion would have inclined and in some measure have determined Peter to deny Christ, but yet only in a general way, that he would deny Him some time in the night, but not at that particular moment or occasion, or before such and such people. All his particular acts then would have been free. And in like manner that knowledge, that we cannot avoid all venial sins, obliges us to fall into them at some time or another. But yet only generally, and in a confused way. For as often as we commit this or that venial sin, we sin of free choice. Theologians, and Suarez in his treatise on Hope, teach us that if a man"s damnation were revealed to him, he could not possibly effectually hope for eternal life, as already apprehending it to be impossible (for no one can attempt what he thinks impossible). But yet he both ought and can observe God"s commands, and that as often as he transgresses he would do so freely and sinfully, even though he is generally aware that he would fall into, and die in, some mortal sin. This fall of Peter and the rest made them more humble and cautious. See John 21:15, John 21:21, John 21:22.