All children are essentially criminal.

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.

Whether God exists or does not exist, He has come to rank among the most sublime and useless truths.

In any country where talent and virtue produce no advancement, money will be the national god. Its inhabitants will either have to possess money or make others believe that they do. Wealth will be the highest virtue, poverty the greatest vice.

One may demand of me that I should seek truth, but not that I should find it

I have not the hope of being immortal, because the desire of it has not given me that vanity.

If you want me to believe in God, you must make me touch him.