Ambition and suspicion always go together.

Delight at having understood a very abstract and obscure system leads most people to believe in the truth of what it demonstrates.

Just as there are polysyllabic words that say very little, so there are also monosyllabic words of infinite meaning.

Man is to be found in reason, God in the passions.

The proof that man is the noblest of all creatures is that no other creature has ever denied it.

The construction of the universe is certainly very much easier to explain than is that of the plant.

To many people virtue consists chiefly in repenting faults, not in avoiding them.