Either you run the day or the day runs you.
Problems are not stop signs, they are guidelines.
What you do today can improve all your tomorrows.
Go for it now. The future is promised to no one.
If you think you can do it, you can.
I can, therefore I am.
To be a good loser is to learn how to win.
Well done is better than well said.
Never complain and never explain.
By failing to prepare, you are preparing to fail.
I wrote somewhere during the Cold War that I sometimes wish the Iron Curtain were much taller than it is, so that you could see whether the development of science with no communication was parallel on the two sides. In this case it certainly wasn't.