Kallistos Ware (born Timothy Ware on 11 September 1934) is an English bishop within the Eastern Orthodox Church under the Ecumenical Patriarchate of Constantinople and one of the best-known contemporary Eastern Orthodox theologians. From 1982 he has held the Titular Bishopric of Diokleia. In 2007 the bishopric was made a titular metropolitan bishopric.

This book is a general account of the doctrine, worship and life of Orthodox Christians by the author of the now classic The Orthodox Church. It raises the basic issues of theology: God is hidden yet revealed; the problem with evil; the nature of salvation; the meaning of faith; prayer; death and what lies beyond. In so doing, it helps to fill the need for modern Orthodox catechism. Yet this book is not a mere manual, a dry-as-dust repository of information. Throughout the book, Bishop Kallistos Ware shows the meaning of Orthodox doctrine for the life of the individual Christian. Doctrinal issues are seen not as abstract propositions for theological debate but as affected the whole of life.

A wealth of texts drawn from theologians and spiritual writers of all ages accompanies Bishop Kallistos' presentation. They too reveal Orthodoxy not just as a system of beliefs, practices and customs but indeed as the Way.