To understand one woman is not necessarily to understand any other woman.

It must be granted that in every syllogism, considered as an argument to prove the conclusion, there is a petitio principii. When we say, All men are mortal Socrates is a man therefore Socrates is mortal; it is unanswerably urged by the adversaries of the syllogistic theory, that the proposition, Socrates is mortal.

Bad men need nothing more to compass their ends, than that good men should look on and do nothing.

Every one is degraded, whether aware of it or not, when other people, without consulting him, take upon themselves unlimited power to regulate his destiny.

The concessions of the privileged to the unprivileged are seldom brought about by any better motive than the power of the unprivileged to extort them.

There is nothing which an untrained mind shows itself more hopelessly incapable, than in drawing the proper general conclusions from its own experience. And even trained minds, when all their training is on a special subject, and does not extend to the general principles of induction, are only kept right when there are ready opportunities of verifying their inferences by facts.

Each undervalues that part of the materials of thought with which he is not familiar.