Of all the knowledge, that most worth having is knowledge about health! The first requisite of a good life is to be a healthy person.

It must be admitted that the conception of virtue cannot be separated from the conception of happiness-producing conduct.

The forces which are working out the great scheme of perfect happiness, taking no account of incidental suffering, exterminate such sections of mankind as stand in their way, with the same sternness that they exterminate beasts of prey and herds of useless ruminants.

Marriage: A word which should be pronounced "mirage".

If men use their liberty in such a way as to surrender their liberty, are they thereafter any the less slaves? If people by a plebiscite elect a man despot over them, do they remain free because the despotism was of their own making?

The ultimate result of shielding men from the effects of folly, is to fill the world with fools.

If every man has freedom to do all that he wills, provided he infringes not the equal freedom of any other man, then he is free to drop connection with the state-to relinquish its protection, and to refuse paying toward its support.