I can, therefore I am.
Leap, and the net will appear.
Never complain and never explain.
Expect problems and eat them for breakfast.
It's always too early to quit.
If you think you can do it, you can.
The wise does at once what the fool does at last.
Well done is better than well said.
After a storm comes a calm.
Be kind whenever possible. It is always possible.
A teacher must believe in the value and interest of his subject as a doctor believes in health.
A good teacher is a determined person.