As long as justice and injustice have not terminated their ever renewing fight for ascendancy in the affairs of mankind, human beings must be willing, when need is, to do battle for the one against the other.

Belief, thus, in the supernatural, great as are the services which it rendered in the early stages of human development, cannot be considered to be any longer required, either for enabling us to know what is right and wrong in social morality, or for supplying us with motives to do right and to abstain from wrong.

The most important thing women have to do is to stir up the zeal of women themselves.

...to bring a child into existence without a fair prospect of being able, not only to provide food for its body, but instruction and training for its mind is a moral crime, both against the unfortunate offspring and against society

The philosophy of reasoning, to be complete, ought to comprise the theory of bad as well as of good reasoning.

All desirable things... are desirable either for the pleasure inherent in themselves, or as a means to the promotion of pleasure and the prevention of pain.

What is contrary to women's nature to do, they never will be made to do by simply giving their nature free play.