I wrote this book so that God's plan for evangelism and discipleship may be clearly seen and followed. I believe that when Christians execute this plan God will work in them and through them to achieve his purposes. This book is for the person who wants to systematically study what Jesus taught on evangelism and discipleship from the four gospels: Matthew, Mark, Luke, and John. It includes both my commentary and the entire text of the scriptures that my commentary is based upon. I use the term "Ambassador" frequently in this book because I believe that Christians should see themselves as God's representatives of His kingdom here on earth. Jesus taught His apostles the foundational truths that were used to establish the early church and should be used by Ambassadors to help today's church grow.