Cette citation est attribuée à François de La Rochefoucauld, extraite de ses 'Réflexions ou sentences et maximes morales' (1665), une œuvre majeure de la littérature morale française du XVIIe siècle.
"There is no vice nor folly that requires to be managed with as much delicacy and skill as vanity; and there is none that, when ill-directed, makes a more contemptible figure."