Pharisees and Sadducees demand a sign from heaven. Jesus warns of the leaven of the Sadducees and Pharisees. Peter confesses Jesus is the Messiah, the Son of God, and Jesus says Peter is blessed and grants him the keys of the kingdom. He seems to have the power to bind and loose. Jesus foretells his death and resurrection and urges disciples to pick up their cross and follow him. Another discussion of the end times, too.