The aim of the Church Times Study Guides is to inform Christians about aspects of belief and practice in a systematic way so they may think, act and respond to the intellectual challenges of the day with greater confidence. Each short booklet includes a brief historical survey of its subject to show how understanding has developed over 20 Christian centuries and the range of theological viewpoints about any given subject is represented. This booklet focuses on one of the most essential disciplines of the Christian life: prayer. The life of the church is regulated by its round of daily prayer that has its roots in the temple worship of the Old Testament and is shaped by the monastic daily office. Lex orandi, lex credendi - 'As we pray, so we believe' ' has been a maxim of Christian doctrine for centuries. This guide helps to explore our own ways of praying, both individually and together.