What would constitute useful history? That which should teach us our duties and our rights, without appearing to teach them.
The man visited by ecstasies and visions, who takes dreams for realities is an enthusiast; the man who supports his madness with murder is a fanatic.
Work spares us from three evils: boredom, vice, and need.
Doubt is not a pleasant condition, but certainty is absurd.
I am very fond of truth, but not at all of martyrdom.
It requires ages to destroy a popular opinion.