This humble book is an open memorandum to all the Muslims of the world, whether Shīʿa, Sunni, Ibāḍi, Ṣūfi, etc. It is a memorandum of love and affection, of brotherhood and amity, of truth and sincerity; a memorandum of laying the facts bare and exposing the truth. It is one of critiquing oneself and others, turning a new page, and defining the school of the Ahl al-Bayt and their followers (the Twelver Shīʿa school). We aim to reveal in it the thoughts, investigations, responsibilities, aspirations, visions, concepts, and inferences that are held by the adherents of this faction. We will briefly summarize their beliefs, jurisprudence, methodologies, relationship with others, viewpoints, achievements, and historical responsibility.