"In matters of truth and justice, there is no difference between large and small problems, for issues concerning the treatment of people are all the same."

"Love is a better teacher than duty."

"If we knew what it was we were doing, it would not be called research, would it?"

"Great spirits have always encountered violent opposition from mediocre minds."

"As I have tried to show, science, in producing the airplane and the wireless, has created a new international political environment to which governments must adjust their foreign policies."

"History is the science of things which are not repeated."

"Of course in science there are things that are open to doubt and things need to be discussed. But among the things that science does know, evolution is about as certain as anything we know."

"The thing that interests me least about the radio business is the radio business. But I've had to learn a little bit about it. It's not rocket science: You get ratings, that's good."