And walking round beside the sea of Galilee he saw two brethren—Simon who is called Peter, and Andrew his brother,—casting a large fishing-net into the sea, for they were fishers; and he saith unto them, Come after me,— And I will make you fishers of men.” (Matthew 4:18–19, EMPH)

Jesus called. Andrew and Peter followed. They would still be fishermen, but now they would be fishing for people.  It is a vocation which despite fits and starts, denial and abandonment [of Jesus] they would keep until they were both martyred for following Jesus.

When they dropped their nets and left their occupation for Jesus they did not know what awaited them.  Church tradition says that they were both crucified, Peter upside down because he did not want to be crucified in the same way as Christ. As they awaited the most grizzly of executions, would they have gone back to this moment in time and not followed Jesus?  Hardly. The last words that Peter will write are:

But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be the glory both now and to the day of eternity. Amen.” (2 Peter 3:18, ESV)

Peter and Andrew understood that life was short, difficult, and sometimes painful, but that Jesus was more important than all of that.  Their suffering was not worthy to be compared with the eternal weight of glory that awaited them…and awaits us.