The thinking it took to get us into this mess is not the same thinking that is going to get us out of it.

As far as I'm concerned, I prefer silent vice to ostentatious virtue.

A conviction akin to religious feeling of the rationality or intelligibility of the world lies behind all scientific work of a high order.

If someone feels that he has never made a mistake in his life, it only means that he has never tried anything new in his life.

What distinguishes the language of science from language as we ordinarily understand the word? ... What science strives for is an utmost acuteness and clarity of concepts as regards their mutual relation and their correspondence to sensory data.

It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing - a somewhat unfamiliar conception for the average mind. Furthermore, the equation E = mc², in which energy is put equal to mass, multiplied by the square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa.

But the personality that finally emerges is largely formed by the environment in which a man happens to find himself during his development, by the structure of the society in which he grows up, by the tradition of that society, and by its appraisal of particular types of behavior.