Problems are not stop signs, they are guidelines.
Leap, and the net will appear.
Expect problems and eat them for breakfast.
The secret of getting ahead is getting started.
If you're going through hell, keep going.
Be gentle to all and stern with yourself.
You never know what motivates you.
Things do not happen. Things are made to happen.
Never complain and never explain.
The most effective way to do it, is to do it.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.