If you think you can do it, you can.
Either you run the day or the day runs you.
Problems are not stop signs, they are guidelines.
To be a good loser is to learn how to win.
You never know what motivates you.
Who seeks shall find.
I can, therefore I am.
Be kind whenever possible. It is always possible.
The dog that trots about finds a bone.
If you're going through hell, keep going.
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.