This planet’s secret menace was—freedom! — Robert Sheckley

Paradox is the inevitable forerunner of chaos.

“Now look,” Janice said. “If the king is so rich, why can’t he pay?”

“The king never pays for anything he can get free,” the ferra said. “That’s why he’s so rich.”

“What kind of intelligent beings would evolve on a planet that is all mountains?”

“Stupid ones!” Casker said.