Be thine own palace, or the world's thy jail.
Do not weep do not wax indignant. Understand.
Problems are not stop signs, they are guidelines.
Leap, and the net will appear.
What you do today can improve all your tomorrows.
It's always too early to quit.
Well done is better than well said.
You never know what motivates you.
I can, therefore I am.
The wise does at once what the fool does at last.
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.