This book focuses on the principles of religion which are relevant to the thought and soul of human beings, reason and intellect follow it, and deeds and movement of human beings spring forth from its fountainhead accordingly. "Does this world have a Creator and God or has it been created by itself without any cause? If there is a God then what are His attributes and works? Does God assign an obligation for us, or are we not without some from of responsibility? Were the divine messengers truthful in their claims or not? Is it possible that after this world there exists another world whereby a human being would see reward or punishment for his/her deeds? The human faculty of reason in accordance with his primitive nature and special creation desires to find out about these realities, remove curtains from mysteries, provide correct answers to these inquiries and many more alike. It certainly possesses this distinction where it can distinguish between the truth and falsehood, naturally is inclined to discover the realities, causes of things, and until it rests upon an absolute certainly it does not feel comfortable."