The title of this book refers to the fulfillment of the two Covenants: the Covenant of the Children of Adam and their descendants with God acknowledging His Lordship over them; and the Covenant of the Prophets, ie. of Nuh, of Ibrahim, of Musa, and of Isa with God. They were asked to acknowledge the coming of a Messenger after them who would confirm whatever was with them of the Scripture and the wisdom that God gave them, and to believe in him and give him their support. They acknowledged it. Then the Messenger who would come after them, i.e. the Prophet Muhammad, would come in time and take his turn to confirm for himself whatever was with the Prophets by incorporating them with what was with him, i.e. the Quran, into the universal religion of Islam that he brought. Thus, the Prophet Muhammad fulfilled both primordial Covenants. This book is written as a discourse intended for those of discernment among my friends and students familiar with my writings and my method of reasoning.