Any pleasure that does no harm to other people is to be valued.

Aristotle could have avoided the mistake of thinking that women have fewer teeth than men, by the simple device of asking Mrs. Aristotle to keep her mouth open while he counted.

In the part of this universe that we know there is great injustice, and often the good suffer, and often the wicked prosper, and one hardly knows which of those is the more annoying.

Thought is merciless to privilege, established institutions, and comfortable habit.

Why is propaganda so much more successful when it stirs up hatred than when it tries to stir up friendly feeling?

I can't tell whether I am living in a dream or a nightmare.

Insight, untested and unsupported, is an uncertain guarantee of the truth.