Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it is the only 
thing that ever has.
If we are to achieve a richer culture, rich in contrasting values, we must recognize the whole gamut of human potentialities, and so weave a less arbitrary social fabric, one in which each diverse human gift will find a fitting place.
No society has ever yet been able to handle the temptations of technology to mastery, to waste, to exuberance, to exploration and exploitation. We have to learn to cherish this earth and cherish it as something that's fragile, that's only one, it's all we have. We have to use our scientific knowledge to correct the dangers that have come from science and technology.
The first step in the direction of a world rule of law is the recognition that peace no longer is an unobtainable ideal but a necessary condition of continued human existence. But to take even this step we must return to a calm and responsible frame of mind in which we can face the long patient tasks ahead.
Human nature is potentially aggressive and destructive and potentially orderly and constructive.
I have a respect for manners as such, they are a way of dealing with people you don't agree with or like.
I learned the value of hard work by working hard.
I must admit that I personally measure success in terms of the contributions an individual makes to her or his fellow human beings.
I was brought up to believe that the only thing worth doing was to add to the sum of accurate information in the world.
If we are to achieve a richer culture, rich in contrasting values, we must recognize the whole gamut of human potentialities, and so weave a less arbitrary social fabric, one in which each diverse human gift will find a fitting place.