As you get older, don't slow down. Speed up. There's less time left!
It's the less bright students who make teachers teach better.
Occasionally indulging in a do-nothing day is more than worth the price.
After the fact, our hearts always go out to the fallen Goliaths. Yet we invariably root for their Davids. Until they're winners.
Since you have to do the things you have to do, be wise enough to do some of the things you want to do.
Too few accomplish twice as much as too many.