Related:

• The optimist thinks that this is the best of all possible worlds, and the pessimist knows it.
  -- J. Robert Oppenheimer, "Bulletin of Atomic Scientists" Yet creeds mean very little, Coth answered the dark god, still speaking almost gently....
• The optimist proclaims that we live in the best of all possible world
  and the pessimist fears this is true. -- James Branch Cabell, from The Silver Stallio...
• The optimist proclaims that we live in the best of all possible world
  and the pessimist fears this is true." -- Irving Caesa...
• The Cardinal Conundrum: An optimist believes we live in the best of all possible worlds.
  A pessimist fears this is true....
• The optimist thinks this is the best of all possible worlds.
  The pessimist fears it is true. --Robert Oppenheime...
• The optimist thinks this is the best of all possible worlds, and the pessimist knows it.
  -- J. Robert Oppenheimer, "Bulletin of the Atomic Scientists" 1951...
• All is for the best in this best of all possible worlds.
• My own suspicion is that the universe is not only queerer than we suppose, but queerer than we can suppose.
  J. B. S. Haldane [essay, 'Possible Worlds', 1927]...
• In this best of all possible worlds, everything is in a hell of a mess. -- Brother Theodore