Mark Twain - "Always acknowledge a fault. This will throw those in authority off their guard and give you an opportunity to commit more."
MT is a darling! :) BTW, a nice tidbit in case you've not read this before. MT predicted (perfectly) as to when he would die. He was born during the year when Halley's Comet whizzed past earth and died when the same comet was to whizz past earth on its next - return - journey, some 75 years later....! MT called himself and the comet "two unaccountable freaks" who had to come in and go out together! :P