This book analysis the calling of God. Although its main aim is to address the ecclesiastic call of Ministers, it however also addresses the general calling of people to know God. There are three components in this book. The first one is to try and understand what spiritual calling entails. Secondly the book tries to ascertain people's perceptions on the call. Lastly, the book addresses how God call people into Ministry. It uses a heuristic approach to understand this phenomenon.