The ancient philosophical heritage played a large role in the development of the spiritual culture of mankind. The perception of this heritage, the originality of its processing, is an essential part of al-Farabi's work. Starting with al-Farabi in the East, in contrast to the dogmas of the Quran, the doctrine of reason is formed. It permeates both cosmology, since reason is considered the origin of the world, and sociology, since the concept of a reasonably arranged human hostel develops, and ethics, which represents truth and virtue in their harmonious unity.