All that a person touches with love will be given light and life; and lack of love causes all death and decay. Glasses will break and saucers will crack when a loveless person touches them. One may not yet have had this experience, but one day one will see that, when an inharmonious person enters the house, things begin to break, accidents happen, pet animals such as dogs and cats become restless.
— Hazrat Inayat Khan, The Heart of Sufism by H. J. Witteveen, editor