The book "Mysteries of Life" is the first book which reveals the secrets of the society of the world's confidants by that society's last remnant. These secrets have been hidden from public for thousands of years, and now based on his duty, the last remnant of the group, which we know as Mithraism, intends to transfer these world secrets to the people of the earth. Before landing and being born on the earth, in the heavens (or sky), man is a creative who comes to the earth on his own will and wish to promote his position and improve his creation abilities in the heavens. He spends a short period of his life on the earth and while he is left on the earth in a limited body with closed eyes and ears, the main duty of this creative is to recognize himself and his surrounding world. The stars and planets around the world and every part of this infinite universe is full of groups of very wise and intellectual people who, in their highest intellectual civilization, are busy creating and monitoring the universe. The aim of this book is to explain and describe the secrets of life and this infinite universe to all humans, and to facilitate the connection between earthly and extraterrestrial humans.