This collection of selected works of the great Islamic theologian and thinker al-Ghazali, whose strong influence was felt by all, including European, medieval philosophy, includes two chapters of his most important work "Revival of the Sciences of Faith," the book "Instruction to Rulers," written in the form of an appeal to Sultan Malik Shah, as well as messages about the innermost side of religious knowledge - "Niche of Light" and "Divine knowledge." All these works, written almost a thousand years ago, are still relevant: for example, the principles of governing the state and building relations between the leader of the country, his officials and the common people, set out in the "Instruction to the Rulers," can be embodied today.