There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know.

Be precise. A lack of precision is dangerous when the margin of error is small.

If you are not criticized, you may not be doing much.

Think ahead. Don't let day-to-day operations drive out planning.

First rule of politics: you can't win unless you're on the ballot. Second rule: If you run, you may lose. And, if you tie, you do not win.

If in doubt, don't. If still in doubt, do what's right.

It is easier to get into something than to get out of it.

Be yourself. Follow your instincts. Success depends, at least in part, on the ability to 'carry it off.'

If it were a fact, it wouldn't be called intelligence.