Always desire to learn something useful.
You never know what motivates you.
To be a good loser is to learn how to win.
I can, therefore I am.
Without hard work, nothing grows but weeds.
Expect problems and eat them for breakfast.
Problems are not stop signs, they are guidelines.
If you're going through hell, keep going.
If you can dream it, you can do it.
Only the educated are free.
In those early years in New York when I was a stranger in a big city, it was the companionship and later friendship which I was offered in the Linnean Society that was the most important thing in my life.