Every animal leaves traces of what it was; man alone leaves traces of what he created.

It is important that students bring a certain ragamuffin, barefoot irreverence to their studies; they are not here to worship what is known, but to question it.

No science is immune to the infection of politics and the corruption of power.

Ask an impertinent question and you are on the way to the pertinent answer.

Man is unique not because he does science, and his is unique not because he does art, but because science and art equally are expressions of his marvelous plasticity of mind.

Knowledge is an unending adventure at the edge of uncertainty.

The hand is the cutting edge of the mind.

We have to understand that the world can only be grasped by action, not by contemplation. The hand is more important than the eye ... The hand is the cutting edge of the mind.

Man masters nature not by force, but by understanding

Dissent is the mark of freedom.

One aim of physical sciences had been to give an exact picture the material world. One achievement of physics in the twentieth century has been to prove that that aim is unattainable.

If your outer world is shaky, go within.

No matter how much (or how little) help someone provides, always say thanks. Thank yous are simple but important.

four meta-movements that separately and together are redefining the American dream: living with limits, embracing diversity, looking inward, and demanding authenticity.

I have devoted much time and energy to helping medical physics in developing countries.

No power but Congress can declare war, but what is the value of this constitutional provision, if the President of his own authority may make such military movements as must bring on war?

Just never forget to be dexterous and deft. And never mix up your right foot with your left. And will you succeed? Yes! You will, indeed! (98 and 3/4 percent guaranteed.)

To know a thing well, know it's limits; Only when pushed beyond it's tolerance will it's true nature be seen. -The Amtal Rule

I think part of the appeal of Antarctica is experiencing some sort of power, the forces of the natural world.

I certainly got the jokes within the joke, dressing up in a wet suit, sitting in a Twingo, scaling a rubber mountain, dressing up and stealing a diamond, of course. If not now, when?

In romance, there's nothing more attractive to a man than a woman who has dignity and pride in who she is.