"The freedom of thought and speech must be preserved in all circumstances."

"The creative scientist has to be a man of faith. He must have faith in his results, and in the laws of nature."

"When you change the way you look at things, the things you look at change."

"When we consider the development of science, we cannot help noticing that it is in many places the work of individuals who, in opposition to the general current of their time, have succeeded in imposi…"

"What is the good of a scientific discovery that does not make a difference in everyday life?"