The dead govern the living.

Language forms a kind of wealth, which all can make use of at once without causing any diminution of the store, and which thus admits a complete community of enjoyment; for all, freely participating in the general treasure, unconsciously aid in its preservation.

The word right should be excluded from political language, as the word cause from the language of philosophy.

To understand a science it is necessary to know its history.

Men are not allowed to think freely about chemistry and biology: why should they be allowed to think freely about political philosophy?

In mathematics we find the primitive source of rationality; and to mathematics must the biologists resort for means to carry out their researches.

All good intellects have repeated, since Bacon's time, that there can be no real knowledge but which is based on observed facts.