When Jesus ascended to heaven, he left us with a very clear mission: to make disciples. And this mission is for all believers, young and old, past and present. In this book, we explore the Bible, analyzing the principles of discipleship, in order to understand and put this very special mission into practice. We have an ideal: a growing church is necessarily a church that calls out. It has its doors open. It is like a hospital where people come to be healed. All its activities are directed toward calling sinners to repentance and to become part of the kingdom of God. It is a welcoming church. Now it is up to us to be part of this mission. Are you ready?