Matthew 14:31

And immediately Jesus stretched forth his hand, and took hold of him, and saith unto him, O thou of little faith, wherefore didst thou doubt? And when they were gone up into the boat, the wind ceased. And they that were in the boat worshipped him, saying, Of a truth thou art the Son of God.

Peter's failure was due to lack of faith; and the rebuke was therefore deserved. He apparently profited by it. The acknowledgment of the disciples that Jesus was in fact the Son of God showed that Christ's schooling of them was achieving his purpose. The great calm was proof of Jesus' power. See note under Matthew 8:26 for evidence that this storm, and that, probably resulted from satanic instigation. The grand design of Christ's purpose is plain. Rejected at Nazareth, improperly acclaimed by the rabble at Bethsaida-Julius, Christ is recognized by the disciples as the Son of God. That was the big thing that he came to teach, and the germ of this world-shaking truth was already firmly implanted in the minds of the apostles by the time this remarkable event was concluded. From that overwhelming experience, Peter no doubt drew the faith to confess Christ as recorded in Matthew 16:16. The difference in his confession and that recorded here was a matter of circumstances. Under the excitement and joy of the moment, they all said he was the Son of God; but it remained for Peter to come through with the formal affirmation of it in the face of adverse opinion to the contrary.