It occurred to him that what had appeared perfectly impossible before, namely that he had not spent his life as he should have done, might after all be true. It occurred to him that his scarcely perceptible attempts to struggle against what was considered good by the most highly placed people, those scarcely noticeable impulses which he had immediately suppressed, might have been the real thing, and all the rest false. And his professional duties and the whole arrangement of his life and of his family, and all his social and official interests, might all have been false. He tried to defend all those things to himself and suddenly felt the weakness of what he was defending.
Leo Tolstoy, The Death of Ivan Ilyich, ch.11