And goodness in marriage is a more intricate problem than mere single virtue; for in marriage there are two ideals to be realised.
婚姻中的善,比一个人独处时的美德更为复杂,因为婚姻里有两个人的理想需要实现。
— Robert Louis Stevenson · Virginibus Puerisque, and Other Papers · Virginibus Puerisque II —