The programmatic work of the largest French philosopher Jacques Maritain (1882-1973) gives the reader a multilateral view of the philosophy of neotomism. The author talks about the evolution of his worldview; considers such problems of the religious and philosophical teachings of Thomas Aquinas as freedom, immortality of the individual, the nature of evil, the relationship of essence and existence; characterizes the main currents of contemporary Christian philosophy. The book is intended for everyone who cares about eternal questions, is interested in the history of philosophical and religious thought.