This book is meant to explore those primary realities of man's relation to God which are expressed by his devotional actions. It presents an enduring study on the nature and principles of worship and the foremost forms in which they are articulated in Christianity. The Author contends that though it may be possible that there is diversity in the expressive worship of each of the member of a Christian family, but they all are directed towards the single revelation of the Divine. Inter-alia, this solemn presentation is divided into two parts. The First part encircles the fundamental characteristics of Christian worship. The methodology in which ritual, symbol, sacrament and sacrifice become part of worship is also examined. The Second part presents descriptive and historical studies that are intended to illustrate the principles of worship, as embodied in the chief type of cults. It provides a thoughtful introduction on the subject of Christian worship and its interrelation with specific rituals and ceremonies. Also, a separate `Index of Subjects' amplify the value of this handy presentation. This book is a must buy for Christian Laity, Church Clergies, Researchers, and all those Church ministers who want to enrich their understanding on the subject for further impartation.