The courage of the truth is the first condition of philosophic study.

Poverty in itself does not make men into a rabble; a rabble is created only when there is joined to poverty a disposition of mind, an inner indignation against the rich, against society, against the government.

Every idea, extended into infinity, becomes its own opposite.

The valor that struggles is better than the weakness that endures.

In duty the individual acquires his substantive freedom

Truth in philosophy means that concept and external reality correspond.

Serious occupation is labor that has reference to some want.