“The great use of life is to spend it for something that will outlast it.”

“The best use of life is to spend it for something that outlasts it.”

“The greatest use of life is to spend it for something that will outlast it.”

“The great value of life is to spend it on something that will outlast it.”

“If this life is not a real fight, in which something is eternally gained for the universe by success, it is no better than a game of private theatricals from which one may withdraw at will. But it feels like a real fight.”

“A great many people think they are thinking when they are merely rearranging their prejudices.”

“As a rule we disbelieve all the facts and theories for which we have no use.”