The things most people want to know about are usually none of their business.

If all the statisticians in the world were laid head to toe, they wouldn't be able to reach a conclusion

I ... must continue to strive for more knowledge and more power, though the new knowledge always contradicts the old and the new power is the destruction of the fools who misuse it.

If you cannot get rid of the family skeleton, you may as well make it dance.

Of all human struggles there is none so treacherous and remorseless as the struggle between the artist man and the mother woman.

At present, intelligent people do not have their children vaccinated, nor does the law now compel them to. The result is not, as the Jennerians prophesied, the extermination of the human race by smallpox; on the contrary more people are now killed by vaccination than by smallpox.

I must remind you that our credulity is not to be measured by the truth of the things we believe. When men believed that the earthwas flat, they were not credulous: they were using their common sense, and, if asked to prove that the earth was flat, would have said simply, "Look at it." Those who refuse to believe that it is round are exercising a wholesome skepticism.