I can, therefore I am.
Quality is not an act, it is a habit.
If you think you can do it, you can.
You never know what motivates you.
If you're going through hell, keep going.
Know or listen to those who know.
Leap, and the net will appear.
If you can dream it, you can do it.
Problems are not stop signs, they are guidelines.
Either you run the day or the day runs you.
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.