supreme confidence in his own strength.
Like Peter, we often display our pride and ignorance when we brashly claim great self–confidence about something that turns out just the opposite a short time later. For example, we might presumptuously assert to Christian friends that we always maintain our testimony, no matter what the situation. Then, to our shame, the very next week we lie, cheat, or shade the truth to get ourselves out of a difficult circumstance.
But what a reassurance to know that Jesus was willing to die for proud, thoughtless disciples such as Peter and careless followers such as us. Furthermore, our Lord is constantly in the business of forgiving and restoring those who stumble: “He is faithful and righteous to forgive us our sins and to cleanse us from all unrighteousness” (1 John 1:9).
John MacArthur, Strength for Today (Wheaton, IL: Crossway Books, 1997).