If you can dream it, you can do it.
Do not weep do not wax indignant. Understand.
Expect problems and eat them for breakfast.
Always desire to learn something useful.
To know oneself, one should assert oneself.
Problems are not stop signs, they are guidelines.
It's always too early to quit.
The most effective way to do it, is to do it.
Things do not happen. Things are made to happen.
If you think you can do it, you can.
I am a teacher, and I am proud of it. At Cornell University I have taught primarily undergraduates, and indeed almost every year since 1966 have taught first-year general chemistry.