God invented man, and man invented the metric system.
All the time you're saying to yourself, 'I could do that, but I won't,'--which is just another way of saying that you can't.
I would rather have questions that can't be answered than answers that can't be questioned.
Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter. Explore the world. Nearly everything is really interesting if you go into it deeply enough. Work as hard and as much as you want to on the things you like to do the best. Don't think about what you want to be, but what you want to do. Keep up some kind of a minimum with other things so that society doesn't stop you from doing anything at all.
Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.
You have no responsibility to live up to what other people think you ought to accomplish. I have no responsibility to be like they expect me to be. It's their mistake, not my failing.
When a scientist doesn't know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty darn sure of what the result is going to be, he is still in some doubt. We have found it of paramount importance that in order to progress we must recognize our ignorance and leave room for doubt. Scientific knowledge is a body of statements of varying degrees of certainty - some most unsure, some nearly sure, but none absolutely certain.
I know no national boundary where the Negro is concerned. The whole world is my province until Africa is free.
If we could have but one generation of properly born, trained, educated, and healthy children, a thousand other problems of government would vanish.
What you must understand is oppression does not end with the niggers. It does not end with the poor people, it doesn't end with the women, or the pregnant women. It goes on up the line to the executive who has his bag searched in the airport.
People will protect what they love.