Candide

Candide, or Optimism (1759) written by Voltaire, the shining star of the French Enlightenment, is a biting, hilarious and frequently outrageous satire that pokes philosophical fun at -- of all things -- the doctrine of optimism.
Candide is a naïve youth stubbornly adhering to the notion that "all is for the best in this, the best of all possible worlds," despite being cast into a flood of misfortunes and picaresque misadventures that take him around the world.
Whether Candide and optimism itself emerges unscathed in the end, hinges upon his own deceptively simple words: "let us cultivate our garden."