I learned how to make friends and get over enemies from books.

If someone takes advantage of you when you thought you were doing them a kindness, you may just have to chalk that up to "paying rent to your ideals," as Margaret says in E.M. Forester's Howard's End.

It is sometimes "the tender pain of unfulfilled possibilities" which binds friends together, as Anna says in Doris Lessing's The Golden Notebook.

And sometimes, as Virginia Woolf says in The Waves, "When we sit together close, we make an unsubstantial territory."