According to the book of Acts, Barnabas only discipled two people. A recently converted Pharisee named Saul, and a young missionary dropout named John Mark. Saul would become the Apostle Paul and write 2/3 of the New Testament. John Mark would write the Gospel of Mark. The power of Christianity is found in discipleship, not large numbers of church attendance. But you must be willing to trade the 2,000 attenders for the two disciples, and few leaders are willing to do so.