He suffered incessantly from the fact that his critical faculties transcended his constructive capacities. In a manner of speaking, his critical sense robbed him of his love for the offspring of his own mind even before they were born.
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If you can't explain it simply, you don't understand it well enough.
A man's value to the community depends primarily on how far his feelings, thoughts, and actions are directed towards promoting the good of his fellows.
Suspicion against every kind of authority grew out of this experience, an attitude which has never again left me.
Student is not a container you have to fill but a torch you have to light up.
We can't solve problems by using the same kind of thinking we used when we created them.
Don't do anything that goes against your conscience, even if your country says so.
I'd rather be an optimist and a fool than a pessimist and right.
Certain it is that a conviction, akin to religious feeling, of the rationality or intelligibility of the world lies behind all scientific work of a higher order.... This firm belief, a belief bound up with deep feeling, in a superior mind that reveals itself in the world of experience, represents my conception of God.
Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. That's relativity.
To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.
The one who follows the crowd will usually get no further than the crowd. The one who walks alone, is likely to find himself in places no one has ever been.
My passionate sense of social justice and social responsibility has always contrasted oddly with my pronounced lack of need for direct contact with other human beings and human communities.