The Brothers Karamazov (1968) (№ 399884)

It seems to me that such a law of nature to love humanity - does not exist. But if there was still love on the earth, not from the natural law, but only because people believe in its immortality. Destroy in mankind the belief, and it immediately runs out, not only love of neighbor but also any living power to continue life. Without faith in immortality, nothing would be immoral, everything the person will be permitted - literally everything. From selfishness to evil. And not only lawful but recognized as the most reasonable and appropriate outcome in his position.