Those honor nature well, who teach that she can speak on everything...

We run heedlessly into the abyss after putting something in front of us to stop us from seeing it.

The truth about nature we discover with our brains. The truth about religion we discover with our hearts.

Continuous eloquence wearies.

The last act is bloody, however pleasant all the rest of the play is: a little earth is thrown at last upon our head, and that is the end forever.

Since [man] is infinitely removed from comprehending the extremes, the end of things and their beginning are hopelessly hidden from him in an impenetrable secret; he is equally incapable of seeing the nothing from which he was made, and the infinite in which he is swallowed up.

The world is ruled by force, not by opinion; but opinion uses force.