Mark 8:27-35 (NRSV)
27 Jesus went on with his disciples to the villages of Caesarea Philippi; and on the way he asked his disciples, “Who do people say that I am?” 28 And they answered him, “John the Baptist; and others, Elijah; and still others, one of the prophets.” 29 He asked them, “But who do you say that I am?” Peter answered him, “You are the Messiah.” 30 And he sternly ordered them not to tell anyone about him. 31 Then he began to teach them that the Son of Man must undergo great suffering, and be rejected by the elders, the chief priests, and the scribes, and be killed, and after three days rise again. 32 He said all this quite openly. And Peter took him aside and began to rebuke him. 33 But turning and looking at his disciples, he rebuked Peter and said, “Get behind me, Satan! For you are setting your mind not on divine things but on human things.” 34 He called the crowd with his disciples, and said to them, “If any want to become my followers, let them deny themselves and take up their cross and follow me. 35 For those who want to save their life will lose it, and those who lose their life for my sake, and for the sake of the gospel, will save it.