I Believe is a book on the foundational beliefs in Christianity from the beginning and across the centuries. These central declarations of the Christian faith expressed in creeds, confessions, and faith statements inform the spirituality of believers, the order and manner of worship, undergird rituals and faith practices, and shape the understanding, nature, and form of church government and organization or ecclesiology and polity. I Believe shows the power and ability of creeds and confessions to cause splits, schisms, and secessions, and yet also be the glue that unites once different or divided churches. I Believe demonstrates that creeds and confessions inspire, encourage, influence, and impact social, political, and historical transformation and change of individuals, churches, societies, and nations. This book is an analysis of creeds and faith statements of many and different churches from every continent: Catholics, Orthodox, and Protestants. This critical investigation and examination of creeds, confessions, and faith statements is presented with deep historical and theological background towards understanding the development of the thought and teachings of the Christian faith from the beginning. I Believe fills the need for a single volume covering the development and history of the teachings of Christianity throughout the centuries.