642 Quotes by Richard P. Feynman

I wonder why. I wonder why. I wonder why I wonder.

There is no harm in doubt and skepticism, for it is through these that new discoveries are made.

All things are made of atoms-little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another. In that one sentence ... there is an enormous amount of information about the world. His suggestion that the most valuable information on scientific knowledge in a single sentence using the fewest words is to state the atomic hypothesis.

All we know so far is what doesn't work.

We need to teach how doubt is not to be feared but welcomed. It's OK to say, "I don't know."

Nature's imagination far surpasses our own.

See that the imagination of nature is far, far greater than the imagination of man.

In fact, the science of thermodynamics began with an analysis, by the great engineer Sadi Carnot, of the problem of how to build the best and most efficient engine, and this constitutes one of the few famous cases in which engineering has contributed to fundamental physical theory. Another example that comes to mind is the more recent analysis of information theory by Claude Shannon. These two analyses, incidentally, turn out to be closely related.

Experiment is the sole judge of the validity of any idea.