In the Gospel of Matthew there are two lines that seem to suggest a transition in Jesus' ministry and perhaps add some sort of structure to the gospel as a whole.
The first is in 4:17 after Jesus arrives in Capernaum:
From that time Jesus began to preach, saying, "Repent, for the kingdom of heaven is at hand."
The second is in 16:21 following Peter's confession:
From that time Jesus began to show his disciples that he must go to Jerusalem and suffer many things from the elders and chief priests and scribes, and be killed, and on the third day be raised.
However, writing in the Anchor Yale Bible Dictionary, John P. Meier, states his doubts as to whether these phrases are strong enough to be load-bearing for the gospel's structure. "It is questionable whether five Greek words, occurring only twice in the gospel (4:17; 16:21), can be called a 'fixed formula'."
Are these two statements beginning with the words Ἀπὸ τότε ἤρξατο ὁ Ἰησοῦς indicative of a structure in Matthew's text? And if not, is it merely coincidence that they begin similarly? Or is there some other literary connection intended by the author perhaps?