Hermann Hesse, The Glass Bead Game
The old man slowly raised himself from the piano stool, fixed those cheerful blue eyes piercingly and at the same time with unimaginable friendliness upon him, and said: “Making music together is the best way for two people to become friends. There is none easier. That is a fine thing. I hope you and I shall remain friends. Perhaps you too will learn how to make fugues, Joseph.