The exercises are important. The only way to learn how to recognize and exploit the defects in a lock is to practice. This means practicing many times on the same lock as well as practicing on many different locks. Anyone can learn how to open desk and filing cabinet locks, but the ability to open most locks in under thirty seconds is a skill that requires practice.
A lot of artists using non-digital media get paranoid when I talk to them that computers are taking over. This is bad 70's sci-fi. Artists are so paranoid or are such rah-rahs about their particular pursuit or style. It's so neurotic. What a bore.
- Rex Bruce

towards away beyond