Jesus called Simon and Andrew with the words, “Follow me, and I will make you become fishers of men” (Mark 1:17). Mark presents the call as a direct summons into Jesus’ mission.
In Mark 1:16–20, Jesus walks along the Sea of Galilee, notices two sets of brothers at their fishing work, and calls them. To Simon and Andrew he gives a new purpose: they will become “fishers for people.” Both pairs respond at once. The first two leave their nets; the second two leave their boat and their father with hired workers. This call story comes early, right after Jesus begins public activity in Galilee and calls people toward God’s reign (1:14–15). Mark moves quickly from announcement to action: Jesus steps into ordinary work life and creates a circle of close followers who will travel with him.
Mark presents Jesus as taking the initiative. He walks by the Sea of Galilee, sees two working fishing teams, and calls them (Simon and Andrew first; then James and John). The text stresses ordinary work settings (nets, boat, mending) and then a sudden pivot to following Jesus.
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with Mark 1:17, then read the surrounding section so the answer stays connected to the passage's flow.
17Jesus said to them, "Come after me, and I will make you into fishers for men."