The book analyzes the work of one of the largest Russian philosophers of the XX century. Ivan Alexandrovich Ilyin (1883-1954). Particular attention is paid to the two most important works of mature Ilyin - the two-volume work " Hegel's philosophy as a doctrine of the concreteness of God and man ", one of the best in the world philosophical literature about Hegel, and the book " On resistance to evil by force ". The work of the late Ilyin, who tried to formulate the foundations of Orthodox philosophy, is covered in detail.