Jesus said to them, "Follow me, and I will turn you into fishers of people.” They left their nets immediately and followed him. - Mark 1:17-18
When Jesus invited these men to become His disciples (that was the point of this "follow me" invitation) they realized exactly what He meant, for they were fishermen by trade.
Jesus wasn't referring to the holiday weekend, relaxing, cast out a line and wait for the fish to bite kind of fishing. He was referring to the long days/nights of blood, sweat and tears, labor-intensive occupation of net fishing. It involved throwing a round, weighted net over the side of the boat, waiting for it to sink and then pulling it back in - often with little or no results. (See Luke 5:5 and John 21:3) THEY KNEW WHAT HE WAS IMPLYING AND STILL THEY LEFT EVERYTHING TO FOLLOW HIM!!!
Far too many believers are unwilling to put in the time, effort and prayer necessary to truly share the Good News of God's grace to their relational circle. We want something that is socially and financially convenient and that fits into our busy schedule and our lifestyle. This isn't effective. It won't produce the results God intended for us to have. God's way of reaching people requires a lifetime commitment to discipleship (following Him by growing in our trust and obedience to God). If we will simply follow Him, HE will MAKE US fishers of men and women.
All He asks for is our commitment to follow. If we'll do that, He'll take care of the rest!