Religion is the highest vanity.

If you hate something thoroughly without knowing why, you can be sure there is something of it in your own nature.

Reason is the substance of the universe. The design of the world is absolutely rational.

If language had been the creation not of poetry but of logic, we should only have one.

That Man, who flees from truth, should have invented the mirror is the greatest of historical miracles.

One lie does not cost you one truth, but the truth.

What a vast difference there is between the barbarism that precedes culture and the barbarism that follows it.