The philosopher forms his principles on an infinity of particular observations. He does not confuse truth with plausibility, he takes for truth what is true, for false what is false, for doubtful what is doubtful, and probable what is probable. The philosophical spirit is thus a spirit of observation and accuracy.
Denis DiderotWhich is the greater merit, to enlighten the human race, which remains forever, or to save one's fatherland, which is perishable?
Denis DiderotThe man who first pronounced the barbarous word God ought to have been immediately destroyed.
Denis DiderotBut if you will recall the history of our civil troubles, you will see half the nation bathe itself, out of piety, in the blood of the other half, and violate the fundamental feelings of humanity in order to sustain the cause of God: as though it were necessary to cease to be a man in order to prove oneself religious!
Denis Diderot