The Jewish nation dares to display an irreconcilable hatred toward all nations, and revolts against all masters; always superstitious, always greedy for the well-being enjoyed by others, always barbarous - cringing in misfortune and insolent in prosperity.

When we cannot use the compass of mathematics or the torch of experience...it is certain we cannot take a single step forward.

Why, since we are always complaining of our ills, are we constantly employed in redoubling them?

A circumstance which has always appeared wonderful to me, is that such sublime discoveries should have been made by the sole assistance of a quadrant and a little arithmetic.

To announce truths is an infallible receipt for being persecuted.

Those who believe absurdities will commit atrocities.

Every man is a creature of the age in which he lives and few are able to raise themselves above the ideas of the time.