The book "The Apostolic Doctrine" will teach the reader the way God wants us to live the Christian life as children of God. In this book we will learn about the basic and fundamental themes of Christian doctrine, written in a simple way, in a common language and within the reach of those who are just beginning the Christian career, as well as those who want to enrich their knowledge. On the other hand, also, "The Apostolic Doctrine" can serve as a training tool for all those, leaders, teachers and professors who are dedicated to the preparation and training of new believers.