There are two kinds of happiness or contentment for which we mortals are adapted; the first we experience in thinking and the other in feeling. The first is the pure stand most unmixed. Let a man once know what sort of a being he is; how great the being which brought him into existence, how utterly transitory is everything in the material world, and let him realize this without passion in a quiet philosophical temper, and I maintain that then he is happy; as happy indeed as it is possible for him to be.—William Herschel,from a letter to his brother Jacob
Question: How many times can you subtract 7 from 83, and what is left afterwards?
Answer: I can subtract it as many times as I want, and it leaves 76 every time.