It's always too early to quit.
To be a good loser is to learn how to win.
You never know what motivates you.
Quality is not an act, it is a habit.
Never complain and never explain.
If you can dream it, you can do it.
Expect problems and eat them for breakfast.
Know or listen to those who know.
Things do not happen. Things are made to happen.
The wise does at once what the fool does at last.
I tried a dozen different modifications that were rejected. But they all served as a path to the final design.
I'm proud of my invention, but I'm sad that it is used by terrorists.