This wild swan of a world is no hunter's game. Better bullets than yours would miss the white breast, Better mirrors than yours would crack in the flame.

-Jeffers, (John) Robinson
  Solstice,'Love the Wild Swan'.

Theology, sir, is a fortress; no crack in a fortress may be accounted small.

-Miller, Arthur
  Hale. The Crucible, act 2.

You think this cruel? take it for a rule, No creature smarts so little as a fool. Let peals of laughter,Codrus! round thee break, Thou unconcerned canst hear the mighty crack. Pit, box, and gallery in convulsions hurled, Thou stand'st unshook amidst a bursting world.

-Pope, Alexander
  'An Epistle to DrArbuthnot', l.83^8.