Peter took him aside.
To rebuke Jesus.”
καὶ παρρησίᾳ τὸν λόγον ἐλάλει. καὶ προσλαβόμενος ὁ Πέτρος αὐτὸν ἤρξατο ἐπιτιμᾶν αὐτῷ
Mark recounted that Jesus said all these things openly (καὶ παρρησίᾳ τὸν λόγον ἐλάλει). Then Jesus and Peter had a conversation that also can be found in Matthew, chapter 16:22. Peter, using his new authority, took Jesus aside (καὶ προσλαβόμενος). He began to warn, rebuke, or admonish him (ὁ Πέτρος αὐτὸν ἤρξατο ἐπιτιμᾶν αὐτῷ). However, there is no indication of what Peter said as there was in Matthew. Apparently, Peter could not image a Messiah who would suffer and die.