Never complain and never explain.
If you can dream it, you can do it.
By failing to prepare, you are preparing to fail.
You never know what motivates you.
Be thine own palace, or the world's thy jail.
If you think you can do it, you can.
To be a good loser is to learn how to win.
Leap, and the net will appear.
I can, therefore I am.
Be gentle to all and stern with yourself.
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.