The inscrutable wisdom through which we exist is not less worthy of veneration in respect to what it denies us than in respect to what it has granted.

Democracy is necessarily despotism, as it establishes an executive power contrary to the general will; all being able to decide against one whose opinion may differ, the will of all is therefore not that of all: which is contradictory and opposite to liberty.

Intuition and concepts constitute... the elements of all our knowledge, so that neither concepts without an intuition in some way corresponding to them, nor intuition without concepts, can yield knowledge.

The question is not so much whether there is life on Mars as whether it will continue to be possible to live on Earth

There is nothing higher than reason.

Immaturity is the incapacity to use one's intelligence without the guidance of another.

With men, the state of nature is not a state of peace, but war.