33 Peter answered and said unto him, Though all men shall be offended because of thee, yet will I never be offended. 34 Jesus said unto him, Verily I say unto thee, That this night, before the cock crow, thou shalt deny me thrice. 35 Peter said unto him, Though I should die with thee, yet will I not deny thee. Likewise also said all the disciples. (Matthew 26:33-35 KJV)
William Burkitt’s Commentary
See here what strong purposes and settled resolutions both Peter and all the apostles had, to keep close to Christ; but how did their self-confidence fail them!
Learn thence, That self-confidence is a sin, too, too incident to the holiest and best of men. Though all men forsake thee, yet will not I. Good man, he resolved honestly; but too, too much in his own strength. Little, little did he think what a feather he should be in the wind of temptation, if once God left him to the power and prevalence of his own fears.
Observe farther, That the rest of the apostles had the like confidence of their own strength with St. Peter. Likewise also said they all.
Note thence, That the holiest of men know not their own strength till it comes to the trial. Little did these good men imagine what a cowardly spirit they had in them, till temptation put it to the proof.