Christian discipleship began, according to John's Gospel, the day after Jesus was baptized. According to this passage, the first two men to follow Him heard John the Baptist declare that Jesus was the Lamb of God. Andrew and his friend believed what they heard and followed Jesus. Before long, they were telling others about this amazing Man of God! Andrew recruited his brother Peter the next day Jesus found Philip in Galilee; Philip found Nathaniel and soon a movement was born. Not everyone came easily or willingly at first. However, before long, Jesus had twelve disciples. Why only twelve? We don't really know that answer, but twelve has become a symbolic number of completion in Scripture. From Jacob came the twelve tribes of Israel, so it's possible this number was intended to represent each tribe. Christian discipleship is summed up in the Great Commission. After the resurrection and before He ascended into heaven, Jesus appeared one last time to His disciples (they were eleven in number at that time, since Judas Iscariot had betrayed Jesus and hanged himself). This is the moment that He delivered the famous calling for disciples known as The Great Commission: "All authority in heaven and on earth has been given to me. Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age."
Christian discipleship continued to grow when the followers of Jesus gathered in Jerusalem and Peter outlined criteria for selecting a twelfth disciple to replace