We know very little, and yet it is astonishing that we know so much, and still more astonishing that so little knowledge can give us so much power.

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

Science tells us what we can know, but what we can know is little, and if we forget how much we cannot know, we become insensitive to many things of great importance.

No amount of experimentation can ever prove me right a single experiment can prove me wrong.

Faith is a fine invention when gentlemen can see,But microscopes are prudent in an emergency.

Extraordinary claims require extraordinary evidence.