“To use is necessary. And if you can't be used, then you're useless.”
“Use your head, can't you, use your head, you're on earth, there's no cure for that!”
“Can't wear it to the opera," said the Colonel, almost smiling. "Can't wear it to a funeral. Can't use it to hang myself. It's a bit useless, as ties go.”
“It's necessary to use suffering. Otherwise, one is used by it.”
“Useless people are not improved by giving them the impression they are useful.”
“You can't use up creativity. The more you use, the more you have.”