[There has been] every kind of cruelty practiced upon all sorts of people in the name of religion.

No nation was ever so virtuous as each believes itself, and none was ever so wicked as each believes the other.

The chicken noticed that the farmer came every day to feed it. It predicted that the farmer would continue to bring food every day. Inductivists think that the chicken had "extrapolated" its observations into a theory, and that each feeding time added justification to that theory. Then one day the farmer came and wrung the chicken's neck. This inductively justifies the conclusion that induction cannot justify any conclusion.

Force plays a much larger part in the government of the world than it did before 1914, and what is especially alarming, force tends increasingly to fall into the hands of those who are enemies of civilization.

I used, when I was younger, to take my holidays walking. I would cover 25 miles a day, and when the evening came I had no need of anything to keep me from boredom, since the delight of sitting amply sufficed.

What the world needs is not dogma but an attitude of scientific inquiry.

Orthodoxy is the grave of intelligence, no matter what orthodoxy it may be.