A man doesn't know what he knows until he knows what he doesn't know.
Noblest of all dogs is the hot-dog; it feeds the hand that bites it.
When I want your opinion I'll give it to you.
You could generally inform a real close friend: when you have manufactured a idiot of on your own he does not truly feel you've finished a long lasting job.
Middle age is when work is a lot less fun and fun is a lot more work.
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.