Dissent is the native activity of the scientist, and it has got him into a good deal of trouble in the last years. But if that is cut off, what is left will not be a scientist. And I doubt whether it will be a man.

Jacob Bronowski (1908-1974) Polish-English humanist and mathematician

Lecture, MIT (19 Mar 1953)
    (Source)

Reprinted as Science and Human Values, Part 3, sec. 5 "The Sense of Human Dignity" (1961).