It's hard to admit a mistake. But I'm not the only one with this problem.

Once when Frederick II, an eighteenth-century King of Prussia, went on an inspection tour of a Berlin prison, he was greeted with the cries of prisoners, who fell on their knees and protested their unjust imprisonment. While listening to these pleas of innocent, Frederick's eye was caught by a solitary figure in the corner, a prisoner seemingly unconcerned with all the commotion.
"Why are you here?" Frederick asked him.
"Armed Robbery, Your Majesty."
"Were you guilty?" the king asked.
"Oh yes, indeed, Your Majesty. I entirely deserve my punishment." At that Frederick summoned the jailer. "Release this guilty man at once," he said. "I will not have him kept in this prison where he will corrupt all the fine innocent people who occupy it."

-Lloyd H. Steffen, The Christian Century, April 29, 1987, p.403.