Jesus calls four fishermen, Simon, Andrew, James, and John, to follow him and become "fishers of men". They immediately leave their nets and jobs to follow Jesus. True discipleship requires fully committing one's life to Jesus, giving up everything else. The document explores what it means to follow Jesus as Lord rather than being a casual fan. It emphasizes the importance of surrendering fully to God's call and allowing the Holy Spirit to work in one's heart and life.