Perhaps, too, Peter felt somewhat elated and self-important on account of the words which Jesus had just applied to him, and pluming himself upon his exceptional privilege he undertook the duty of reproving his Master. For, Mark tells us, "Peter took Him and began to rebuke Him." A severe reprimand followed. "Jesus turned about, and, seeing His disciples, rebuked Peter, and saith, Get thee behind Me, Satan, for thou mindest not the things of God but the things of men." Matthew adds that Jesus also said, "Thou art a stumbling-block unto Me." Luke kindly omits all reference to the painful moment. Thus, in the course of a few moments, Peter achieved a great spiritual success and was guilty of an unspiritual blunder--he was exalted and humiliated, commended and reproved. In after days he remembered with peculiar distinctness his lack of the true spirit at this hour, and by Mark's agency, therefore, faithfully reproduced for the Church of Christ the record of his well-deserved abasement. All three Synoptists conclude their account of this scene by repeating the great saying of Jesus: "If any man would come after Me let him deny himself and take up his cross and follow Me. For whosoever would save his life shall lose it, and whosoever shall lose his life for My sake and the Gospel's shall save it. For what doth it profit a man to gain the whole world and forfeit his life? For what should a man give in exchange for his life?" Most of us find this lesson as difficult to learn as apparently Peter did.