From Faith Futures
- See also the commentary at 128 Walking on Water
The commentary in The Acts of Jesus (p. 207) notes:
Matthew has taken over the story of Jesus walking on the water from Mark. But he has made two major changes in Mark's version. he has inserted an episode about Peterr attempting to imitate Jesus; Peter fails because he lacks the requisite trust (vv. 28-31). The second change he makes is in the conclusion. Mark has the disciples dumbfounded" as a result of the experience (Mark 6:51). Matthew refurbishes Mark's portrait of the disciples by having them declare in unison, "You really are God's son" (v. 33). Matthew thereby moves te story more in the direction of the conventional miracle story, in which the conclusion consists of testimony that a miracle has taken place.