The Phantom Tollbooth
"Then why bother?" asked Tock, whose alarm suddenly began to ring. (17.13)
"Think of all the trouble it saves," the man explained, and his face looked as if he'd be grinning an evil grin – if he could grin at all. "If you only do the easy and useless jobs, you'll never have to worry about the important ones which are so difficult. You just won't have the time. For there's always something to do to keep you from what you really should be doing, and if it weren't for that dreadful magic staff, you'd never know how much time you were wasting." (17.20)
"Well, time flies, doesn't it?" asked Milo.
"On many occasions," barked Tock, jumping eagerly to his feet. "I'll take everyone down." (18.72-73)