Men expect from the various religions answers to the unsolved riddles of the human condition today as yesterday, deeply stir the heart: What is man? What is the meaning and purpose of life? What is good and what is sin? What is the origin and purpose of pain? What is the path to true happiness? What is death, trial and retribution after death? What, finally, is that ultimate inexpressible mystery which encompasses our existence: whence we come and towards which we tend? Since ancient times to the present day is in the various peoples a certain perception of that mysterious force that is present in the course of things and events of human life and, sometimes, also knowledge of the sum divinity and even the Father. This perception and recognition penetrates their lives with a profound religious sense. Religions, to make contact with the progress of culture, they strive to respond to those problems with more refined concepts and more developed language "(NA, Vatican II). Our own time, so confident in what refers to scientific discoveries, it remains to rediscover the precariousness of the human condition against the fascinating mysteries of our being. For this reason, the content of the articles we have considered the one hand, the manifestations of atheism, unbelief and religious indifference, the agnostic and secularization, and, second, the forms of esotericism and secrecy, cults, religious movements and associations to promote the meeting of cultures and religions. This dictionary is an inventory as complete and accurate as possible of the whole of religious manifestations produced over time and space and as far back as the origin of man. It is an opening at the bottom of man existentially contingent dump into the Infinite. From this angle you have to watch the display of the religions that have been marked from its origins to the present day intellectual and spiritual evolution of mankind: prehistoric religions, religions of Anatolia, sumeriobabilónicas, Egyptian, Indo-European, Iranian, Greek, Roman, Etruscan, Amerindian, Gnostic, Jewish, Christian, Islamic, Buddhist, and the current religions of Africa, Madagascar, Oceania and Australia. The experts who drafted the dictionary have been imposed as a rule provide the reader with the tools available to today's science of religions is a comprehensive package that includes the history, sociology, ethnology, anthropology, philosophy, psychology and theology. He has addressed each of these disciplines for some and others under the plot of the religious phenomenon. This set can capture the fundamental message of the great religions are the living heritage of humanity. The religious man's elementary experience also entails risks. On the way homo religiosus gods are, in turn, inherited myths and forms of 'demons' evil opposes destructive forms of good, magic and witchcraft rise as a threat, a forest of prohibitions and taboos difficult path, which grew into the labyrinth. Offered moral and ethical codes for the pilgrimage through life. The successes of homo religiosus not enroll in both structural and sclerotic forms of religion, but living in the assembly of believers. A work of this caliber to produce this Dictionary should be done with precision and, necessarily, collectively, so it was necessary to resort to competent specialists work together trying to make a smooth writing. One hundred and fifty specialists around Cardinal Paul Poupard have performed this task submitted through 1500 entries and timely referrals and a generous and modern literature, in this Dictionary of religions that welcomes Editorial Herder put in their hands.