"I feel that the recent ruling of the United States Army and Navy regarding the refusal of colored blood donors is an indefensible one from any point of view. As you know, there is no scientific basis for the separation of the bloods of different races except on the basis of the individual blood types or groups."

"He never built a distance to other people despite his scientific position. Sensitive, open to new ideas, with a large personal culture, endowed with excellent emotional intelligence and a kind of medi…"

"I saw that the writers on vegetarianism had examined the question very minutely, attacking it in its religious, scientific, practical and medical aspects. Ethically they had arrived at the conclusion …"

"People say to me, "Are you looking for the ultimate laws of physics?" No, I'm not. I'm just looking to find out more about the world and if it turns out there is a simple ultimate law which explains e…"

"Economic theory, in every branch, deals with practical affairs. Its subject is human welfare, and it is never entirely dissociated from the practical question of how human welfare is to be promoted. B…"