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."
Matthew Henry's Commentary on Mark 8:27-33
Commentary on Mark 8:27-33
(Read Mark 8:27-33)
These things are written, that we may believe that Jesus is the Christ, the Son of God. These miracles of our Lord assure us that he was not conquered, but a Conqueror. Now the disciples are convinced that Jesus is the Christ; they may bear to hear of his sufferings, of which Christ here begins to give them notice. He sees that amiss in what we say and do, of which we ourselves are not aware, and knows what manner of spirit we are of, when we ourselves do not. The wisdom of man is folly, when it pretends to limit the Divine counsels. Peter did not rightly understand the nature of Christ's kingdom.