After hearing some difficult teachings from the Lord, many of His followers turned away "and walked with Him no more." Jesus has just asked the twelve if they will also turn away from Him.
Peter's answer always brings tears to my eyes (though I'm not sure why):
"Lord, to whom shall be go? You have the words of eternal life."
And it has has occurred to me:
this is where the music begins to play in Peter's life.
Peter is convinced that Jesus is the Christ, the Son of the living God.
And once that fact has been clearly understood, there is no where else to go.
(Funny, I've unintentionally got Mozart playing on Pandora as I type now.)
Peter had a long, hard road ahead of him. He would deny the Lord and then repent, suffer extreme cruelty, imprisonment and death.
But none of that mattered
once the music began to play.