In this book, the author has collected some evidences of the sincerity of the Prophet (peace and blessings of Allah be upon him) by which his prophethood is clear and his apparent sincerity in everything he says is evident. These evidences are taken from his biography, his actions, his words, the testimonies of people - whether enemies or agreeing - and other rational evidences, and many of these meanings are taken from the words of those who became Muslims or are fair, as will be discussed below.