Never retract, never explain, never apologize – get the thing done and let them howl!
Nellie McClung, 1915
Source: Nellie McClung. In Times Like These. p.vii introduction by Veronica Strong-Boag, ‘As a campaigner whose slogan was, 'Never retract, never explain, never apologize -get the thing done and let them howl', she became the foremost practitioner of sexual confrontation. Also http://www.swc-cfc.gc.ca/dates/persons/case ; Jowett, Benjamin an eighteenth century English scholar -1817-93, had used a similar expression.