This week's Gospel continues the exchange between Peter and Jesus. Having been recognized as the Son of God, Jesus explains that they will now go to Jerusalem where he will be killed and rise on the third day. Peter objects and Jesus who changed Simon's name to Peter now calls him Satan. Ouch, yeah that had to hurt. Jesus then explains the error Peter has made. The same error that we are so prone to making. This Sunday we will reflect on the error along with Jesus' instructions on how to avoid it.