In today's Gospel, Jesus teaches from Simon's boat. Jesus turns to Simon and instructs him about where to lower the fishing nets. Simon and others have been fishing throughout the night and have not caught anything. Simon protests, claiming that such an effort would be futile. Simon ultimately obeys Jesus and lowers his nets into the deeper water as directed. Notice here that Peter calls Jesus by the title “master.” He already recognizes Jesus as a person of authority. They catch so many fish that the nets begin to tear; Jesus' presence has created abundance out of scarcity, just as it did at the wedding feast at Cana, which we heard at Mass just a few weeks ago.
Simon Peter becomes a follower of Jesus immediately. He calls Jesus “Lord”—the title given to Jesus after his Resurrection—and protests his worthiness to be in Jesus' presence. Today's Gospel, therefore, marks a turning point in the relationship between Jesus and Peter