From Pasternak's Zhivago

 But that’s all rubbish. Let’s go back to what we were talking about. I said we must be faithful to Christ. I’ll explain at once. You don’t understand that one can be an atheist, one can not know whether God exists or why, and at the same time know that man does not live in nature but in history, and that in present-day understanding it was founded by Christ, that its foundation is the Gospel. And what is history? It is the setting in motion of centuries of work at the gradual unriddling of death and its eventual overcoming. Hence the discovery of mathematical infinity and electromagnetic waves, hence the writing of symphonies. It is impossible to move on in that direction without a certain uplift. These discoveries call for spiritual equipment. The grounds for it are contained in the Gospel. They are these. First, love of one’s neighbor, that highest form of living energy, overflowing man’s heart and demanding to be let out and spent, and then the main component parts of modern man, without which he is unthinkable—namely, the idea of the free person and the idea of life as sacrifice. Bear in mind that this is still extremely new. The ancients did not have history in this sense. Then there was the sanguinary swinishness of the cruel, pockmarked Caligulas, who did not suspect how giftless all oppressors are. They had the boastful, dead eternity of bronze monuments and marble columns. Ages and generations breathed freely only after Christ. Only after him did life in posterity begin, and man now dies not by some fence in the street, but in his own history, in the heat of work devoted to the overcoming of death, dies devoted to that theme himself. Ouf, I’m all in a sweat, as they say. But you can’t even make a dent in him!” “Metaphysics, old boy. It’s forbidden me by my doctors; my stomach can’t digest it.” “Well, God help you. Let’s drop it. Lucky man! What a view you have from here—I can’t stop admiring it! And he lives and doesn’t feel it.”