The Ancient and Mystical Order of the Rose-Cross is a philosophical organization that perpetuates the teachings that the initiates have transmitted one to another through the centuries since the highest antiquity. Along with these teachings, it conveys a certain ethic based on the awakening of the virtues inherent in the human soul. Of these virtues, twelve have taken the attention of the grand master of the order, author of this book. Thus, he explains chapter in chapter in which patience, confidence, temperance, tolerance, detachment, selflessness, integrity, humility, courage, nonviolence, benevolence, and wisdom are qualities that every human being must acquire in the course of his existence not only because they justify our spiritual evolution but also because they contribute to the happiness of others.