Forgetting your mistakes is a terrible error if you are trying to improve your cognition.
Charlie MungerMost people early achieve and later intensify a tendency to process new and disconfirming information so that any original conclusion remains intact. They become people of whom Philip Wylie observed: "You couldn't 't squeeze a dime between what they already know and what they will never learn."
Charlie MungerThe stupid and dishonest accountants allowed the genie of totally inappropriate accounting to descend on derivatives books. And once this has happened - people get status, etc. - it's impossible to get it back into the bottle.
Charlie MungerAn investment decision in the common stock of a company frequently involves a whole lot of factors interacting ... the one thing that causes the most trouble is when you combine a bunch of these together, you get this lollapalooza effect.
Charlie MungerI talked to one accountant, a very nice fellow who I would have been glad to have his family marry into mine. He said, "What these other accounting firms have done is very unethical. The [tax avoidance scheme] works best if it's not found out [by the IRS], so we only give it to our best clients, not the rest, so it's unlikely to be discovered. So my firm is better than the others." [Laughter] I'm not kidding. And he was a perfectly nice man. People just follow the crowd...Their mind just drifts off in a ghastly way.
Charlie Munger