In New England they once thought blackbirds useless, and mischievous to the corn. They made efforts to destroy them. The consequence was, the blackbirds were diminished; but a kind of worm, which devoured their grass, and which the blackbirds used to feed on, increased prodigiously; then, finding their loss in grass much greater than their saving in corn, they wished again for their blackbirds.
Benjamin FranklinLet no pleasure tempt thee, no profit allure thee, no persuasion move thee, to do anything which thou knowest to be evil; so shalt thou always live jollity; for a good conscience is a continual Christmas.
Benjamin Franklin