Go for it now. The future is promised to no one.
Well done is better than well said.
Expect problems and eat them for breakfast.
Be thine own palace, or the world's thy jail.
Without hard work, nothing grows but weeds.
I can, therefore I am.
The dog that trots about finds a bone.
If you think you can do it, you can.
Things do not happen. Things are made to happen.
Only the educated are free.
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.