“Given that we cannot know all the elements in a problem, we never can solve it.”

“We cannot solve life's problems except by solving them.”

“Woman is the unfathomable, incalculable mystery, the problem that we men can never hope to solve.”

“The problems of the world cannot possibly be solved by skeptics or cynics whose horizons are limited by the obvious realities. We need men who can dream of things that never were.”

“We should recognize that schools will never solve the bedrock problems of education because the problems are problems of families, of cultural pressures that the schools reflect and thus cannot really remedy.”

“I live and work with three basic assumptions, 1) There is no problem in science that can be solved by a man that cannot be solved by a woman. 2) Worldwide, half of all brains are in women. 3) We all need permission to do science, but, for reasons that are deeply ingrained in history, this permission is more often given to men than to women.”

“We cannot solve our problems with the same thinking we used when we created them.”

“We are like figures which some great demonstrator draws upon the blackboard of Time. A problem is to be solved, without doubt; what the problem is, we, the figures, cannot know and do not need to know; all we know is that sooner or later we shall be sponged off the board and other figures take our places, and the demonstration go on.”

“If the problem can be solved why worry? If the problem cannot be solved worrying will do you no good.”

“The problems of the world cannot possibly be solved by skeptics or cynics whose horizons are limited by the obvious realities. We need men who can dream of things that never were and ask "why not?"”