If you think you can do it, you can.
Problems are not stop signs, they are guidelines.
The most effective way to do it, is to do it.
What you do today can improve all your tomorrows.
Well done is better than well said.
Expect problems and eat them for breakfast.
If you're going through hell, keep going.
If you can dream it, you can do it.
Be gentle to all and stern with yourself.
After a storm comes a calm.
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.