Be gentle to all and stern with yourself.
If you've got a talent, protect it.
I can, therefore I am.
What you do today can improve all your tomorrows.
You never know what motivates you.
Be kind whenever possible. It is always possible.
Who seeks shall find.
The dog that trots about finds a bone.
If you're going through hell, keep going.
If you can dream it, you can do it.
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.