Cass Timberlane, A Novel of Husbands and Wives by Sinclair Lewis

Cass was worried by the pointless possession of two houses. He could not give up the new house--it was hers--but as spring grudgingly came on and he took long walks, he was only too much attracted by Bergheim. He liked to go into that shuttered cavern and sit there, thinking about this whole madhouse of love.

--We're so civilized now that we can kill our horrid enemies-- year-old children--two hundred miles away, but nobody except a few rather loveless professors has even begun to understand love. Compared with our schools and churches, which are supposed to instruct our emotions, the shabbiest business, even advertising whisky, has been magnificent in its competence and integrity.