By Gayle Somers, Catholic Exchange - In last Sunday’s Gospel, Jesus called Peter “the rock.” Today, He calls him “Satan.” What happened?... In the verses preceding today’s passage, Jesus and Peter had a remarkable exchange. Peter identified Jesus as the Christ, the Son of God; Jesus announced that God had revealed this truth to him. On that basis, Jesus changed his name and made him head of the Church He was to build. He made a promise to preserve that Church, giving us some confidence that He wasn’t making a terrible mistake. ....