Here is the way Leo Tolstoi described his religion:
I believe in the doctrine of Jesus, and this is my religion:—
I believe that nothing but the fulfilment of the doctrine of Jesus can give true happiness to men. I believe that the fulfillment of this doctrine is possible, easy, and pleasant. I believe that although none other follows this doctrine, and I alone am left to practise it, I cannot refuse to obey it, if I would save my life from the certainty of eternal loss; just as a man in a burning house if he find a door of safety, must go out, so I must avail myself of the way to salvation. I believe that my life according to the doctrine of the world has been a torment, and that a life according to the doctrine of Jesus can alone give me in this world the happiness for which I was destined by the Father of Life. I believe that this doctrine is essential to the welfare of humanity, will save me from the certainty of eternal loss, and will give me in this world the greatest possible sum of happiness. Believing thus, I am obliged to practise its commandments.
" The law was given by Moses; grace and truth came by Jesus Christ. " (John i. 17.)
The doctrine of Jesus is a doctrine of grace and truth. Once I knew not grace and knew not truth. Mistaking evil for good, I fell into evil, and I doubted the righteousness of my tendency toward good. I understand and believe now that the good toward which I was attracted is the will of the Father, the essence of life.
Jesus has told us to live in pursuit of the good, and to beware of snares and temptations (σκάνδαλον) which, by enticing us with the semblance of good, draw us away from true goodness, and lead us into evil. He has taught us that our welfare is to be sought in fellowship with all men; that evil is a violation of fellowship with the son of man, and that we must not deprive ourselves of the welfare to be had by obedience to his doctrine.
Jesus has demonstrated that fellowship with the son of man, the love of men for one another, is not merely an ideal after which men are to strive; he has shown us that this love and this fellowship are natural attributes of men in their normal condition, the condition into which children are born, the condition in which all men would live if they were not drawn aside by error, illusions, and temptations.
In his commandments, Jesus has enumerated clearly and unmistakably the temptations that interfere with this natural condition of love and fellowship and render it a prey to evil. The commandments of Jesus offer the remedies by which I must save myself from the temptations that have deprived me of happiness; and so I am forced to believe that these commandments are true. Happiness was within my grasp and I destroyed it. In his commandments Jesus has shown me the temptations that lead to the destruction of happiness. I can no longer work for the destruction of my happiness, and in this determination, and in this alone, is the substance of my religion.