"The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful. If nature were not beautiful, it would not be worth kn…"

"The man who has not passed through the bitter experience of doubt, has not made a single step forward in science."

"The highest goal of all science is to understand the human mind."

"The greatest joy of a scientist is to be able to communicate his ideas to others."

"Thermodynamics is a funny subject. The first time you go through it, you don't understand it at all. The second time you go through it, you think you understand it, except for one or two small points.…"