The most amazing and effective inventions are not those which do most honour to the human genius.

Chance is a word void of sense; nothing can exist without a cause.

Every sensible man, every honest man, must hold the Christian sect in horror. But what shall we substitute in its place? you say. What? A ferocious animal has sucked the blood of my relatives. I tell you to rid yourselves of this beast, and you ask me what you shall put in its place ?

The ear is the avenue to the heart.

Injustice in the end produces independence.

Individual misfortunes give rise to the general good; so that the more individual misfortunes exist, the more all is fine.

Present opportunities are not to be neglected; they rarely visit us twice.