Give me the avowed, erect and manly foe; Firm I can meet, perhaps return the blow; But of all plagues, good Heaven, thy wrath can send, Save me, oh, save me, from the candid friend.

-Canning, George
  'New Morality', l.207^8.

   Eye Nature's walks, shoot Folly as it flies, And catch the Manners living as they rise. Laugh where we must, be candid where we can; But vindicate the ways of God to man. See Milton 580:93.

-Pope, Alexander
  An Essay on Man, epistle1, l.13^16.