There are two cardinal rules for becoming a “positive” prisoner. First, accept your own guilt. Whatever the posturings in the courtroom, reality knocks once the cell door slams. The unhappiest prisoners I ever met were those who went on boiling with resentment about the judge, jury, the police and the prosecution witnesses. These whingers were known as “Double Richards” [translation: Richard III = bird; bird = sentence; Double Richard = someone who serves his sentence twice over by falsely protesting their innocence to all comers]. By contrast, sensible prisoners admit that the game is up and that they must pay for their crimes.