The dog that trots about finds a bone.
Know or listen to those who know.
The secret of getting ahead is getting started.
Quality is not an act, it is a habit.
Go for it now. The future is promised to no one.
Well done is better than well said.
Never complain and never explain.
Things do not happen. Things are made to happen.
Problems are not stop signs, they are guidelines.
Do not weep do not wax indignant. Understand.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.