I could not sleep when I got on the hunt for an idea, until I had caught it. This was a kind of passion with me, and it has stuck with me.
It's not me who can't keep a secret. It's the people I tell that can't.
You know you've reached middle age when all you exercise is caution
Never do anything for anyone who can just as well do it themself
A child is a person who is going to carry on what you have started ... the fate of humanity is in his hands.
You know I dislike slavery; and you fully admit the abstract wrong of it.