The rule of philosophers

In this book, the author brings together the wealth of wisdom of the most brilliant human beings who were leaders and shepherds of humanity, based on his many readings in various fields of knowledge and thought, where he says, "My love for acquiring precious books is great, but greater than that is my passion for reading them and contemplating their contents of high wisdom and profound sermons." Mature tests and sound opinions dispel the clouds of doubt and bring me to places of certainty, so I see the truth of life face to face with its radiant light."
These geniuses discovered the unknowns of life and knew the places of darkness and the places of light in it.