Never complain and never explain.
I can, therefore I am.
To be a good loser is to learn how to win.
Only the educated are free.
It's always too early to quit.
Do not weep do not wax indignant. Understand.
If you're going through hell, keep going.
Without hard work, nothing grows but weeds.
The dog that trots about finds a bone.
Well done is better than well said.
Science is a self-sufficient activity.
The thing about science is that it's an accurate picture of the world.