Who are we? Where have we come from? Where are we going? Why do we suffer? These challenging questions, which have always concerned the human mind, Léon Denis addresses and answers precisely, drawing on the principles of the Spiritist Doctrine. The eminent French writer gives us a set of valuable teachings, in which he combines logic and sentiment to extoll the reality of the continued existence or survival of the spirit after the phenomenon of physical death. This book analyses themes such as the evolution of thought, life in the Spirit World, historical proofs of reincarnation, the law of destinies, the powers of the soul, and other interesting and current subjects.