Coming right after Peter’s confession that Jesus is the Messiah, the Son of God, Jesus seems to condemn his Disciple with harsh words. “Get thee behind me, Satan!” It seems a little much, but maybe, just maybe, Jesus wasn’t coming down that hard on Peter, but rather not-so-gently asking Peter to stop tempting him with what it was he really wanted.

http://bible.oremus.org/?ql=388574366