Slump, and the world slumps with you. Push, and you push alone.
The modern child will answer you back before you've said anything.
All science is concerned with the relationship of cause and effect. Each scientific discovery increases man's ability to predict the consequences of his actions and thus his ability to control future events.
The incompetent with nothing to do can still make a mess of it.
The best intelligence test is what we do with our leisure.
If at first you don't succeed, lie, lie again.