Expect problems and eat them for breakfast.
You never know what motivates you.
If you're going through hell, keep going.
The secret of getting ahead is getting started.
Problems are not stop signs, they are guidelines.
Be gentle to all and stern with yourself.
If you've got a talent, protect it.
Never complain and never explain.
The most effective way to do it, is to do it.
Always desire to learn something useful.
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.