If you remember the Gospel from last week, we had the calling of the brothers Andrew and Peter. It was from the Gospel of John, and a slightly different version than what we have this Sunday from the Gospel of Mark. In John, Jesus simply walks by and Andrew follows him. Andrew then finds his brother Peter and brings him to Jesus. In Mark, Jesus approaches Andrew and Peter, who are fishing, and says, “Come after me, and I will make you fishers of men.” They drop their nets and follow. Jesus is more proactive in today's version. So, which version is accurate?
It could be both. Historically speaking, John's version might have occurred first and then Mark's been a further occurrence. That is, after being introduced to Jesus (John), Peter and Andrew might have gone back to fishing and then Jesus called them again (Mark).