Mateus 16
Theodore Stratelates · Comentário Patrístico (catena)
Mateus 16:13
Jesus asks this in order that we might know what opinions about him were current among the Jews. [He also asks] so that we might learn to inquire intently into what people are saying about him, and if it is bad, to remove the causes, or if complimentary, to increase them. But he said "Son of man" in order to show that he himself not only appears to be but in fact unchangeably is man, and again, is true God. [It is] not as if he were divided into different species, one part God and one part man; rather one may address him as Son of man with no doubt that this very same one is also the Son of God. — FRAGMENT 101.5
Mateus 16:23
When, contrary to what he had hoped, Peter heard this, he was troubled. For the revelation had exhibited Christ as Son of God and the living God, on the one hand. Yet on the other hand, he was found to be preparing for the dreadful events of the Passion. In rebuking Peter, Christ brings to light his own righteous judgment. When Peter confessed Christ, Christ praised him. But when he was irrationally terrified, Christ rebuked him, acting without respect of persons. — FRAGMENT 102