Oddly enough, she was one of the most thoroughgoing sceptics he had ever met, and possibly (this was a theory he used to make up to account for her, so transparent in some ways, so inscrutable in others), possibly she said to herself, As we are a doomed race, chained to a sinking ship (her favourite reading as a girl was Huxley and Tyndall, and they were fond of these nautical metaphors), as the whole thing is a bad joke, let us, at any rate, do our part; mitigate the sufferings of our fellow-prisoners (Huxley again); decorate the dungeon with flowers and air-cushions; be as decent as we possibly can. Those ruffians, the Gods, shan’t have it all their own way,—her notion being that the Gods, who never lost a chance of hurting, thwarting and spoiling human lives were seriously put out if, all the same, you behaved like a lady. That phase came directly after Sylvia’s death—that horrible affair. To see your own sister killed by a falling tree (all Justin Parry’s fault—all his carelessness) before your very eyes, a girl too on the verge of life, the most gifted of them, Clarissa always said, was enough to turn one bitter. Later she wasn’t so positive perhaps; she thought there were no Gods; no one was to blame; and so she evolved this atheist’s religion of doing good for the sake of goodness.
(From Mrs Dalloway, Peter Walsh, thinks about Clarissa Dalloway)