Well-observed facts, though brought to light by passing theories, will never die; they are the material on which alone the house of science will at last be built.

It is what we know already that often prevents us from learning.

The experimenter who does not know what he is looking for will not understand what he finds.

When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the theory is supported by great names and generally accepted.

Man can learn nothing unless he proceeds from the known to the unknown.

The terrain is everything; the germ is nothing.

Art is 'I'; science is 'we'.

A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes.

Those who do not know the torment of the unknown cannot have the joy of discovery.

Science increases our power in proportion as it lowers our pride.

All the vital mechanisms, varied as they are, have only one object, that of preserving constant the conditions of life in the internal environment.

Tomorrow may be hell, but today was a good writing day, and on the good writing days nothing else matters.

How would I know which one I was?

New mutations don't create new species

What’s the point of doing what you’re told if you have no choice in the matter?

And then I bought my own horse, which I had until it died.

I worked in the media from the late 30's through the early 70's. Politics in general became more liberal both nationally and within the state as the years passed.

United need to start garnishing some points.

Nevertheless, I have no political agenda whatsoever, even though some might think the contrary.

There are rainy days in autumn and stormy days in winter when the rocking chair in front of the fire simply demands an accompanying book.