In the article the basic principles of L. Tolstoy’s teaching are singled out, which according to his critics testify to its “non-Christian” character. Among these principles, there are emphasis on personal religious experience; emphasis on the importance of reason as the main ability of man in his relationship with God; the understanding of God as an impersonal absolute embracing all that exists. The main principle of Tolstoy’s teaching is the possibility of a person’s merging with God, this leads to the loss of the personality of man; on the other hand, after merging person with God evil, suffering and death become inessential: a religious person must come to an understanding of life as a blessing and realize his own eternity - uncreatedness and indestructibility. Jesus Christ is understood by Tolstoy as a great teacher, and not as a Savior: Christ brought the doctrine of how to make a life good and perfect. Tolstoy denies the idea of a personal bodily resurrection, considering it to be characteristic of Judaism; in the teaching of Tolstoy man is eternal, and death refers only to the empirical level of our existence. It is shown that Tolstoy’s teaching in all these principles coincides with the teaching of Gnostic Christianity. If the hypothesis that the Gnostic apocrypha express the most ancient layer of Christian ideas is true, Tolstoy’s teaching can be recognized as the exact expression of the true, original Christianity.