Science can be introduced to children well or poorly. If poorly, children can be turned away from science; they can develop a lifelong antipathy; they will be in a far worse condition than if they had never been introduced to science at all.

Having no unusual coincidence is far more unusual than any coincidence could possibly be.

If a conclusion is not poetically balanced, it cannot be scientifically true.

I have never written a book that didn't teach me far more than it taught my reader.

The Earth faces environmental problems right now that threaten the imminent destruction of civilization and the end of the planet as a livable world. Humanity cannot afford to waste its financial and emotional resources on endless, meaningless quarrels between each group and all others. there must be a sense of globalism in which the world unites to solve the real problems that face all groups alike.

Congratulations on the new library, because it isn't just a library. It is a space ship that will take you to the farthest reaches of the Universe, a time machine that will take you to the far past and the far future, a teacher that knows more than any human being, a friend that will amuse you and console you-and most of all, a gateway, to a better and happier and more useful life.

Politically popular speech has always been protected: even the Jews were free to say ‘Heil Hitler.’