Discipline is the suppression of base desires, and is usually understood to be synonymous with restraint and self-control. Self-discipline is to some extent a substitute for motivation. Discipline is when one uses reason to determine the best course of action regardless of one's desires, which may be the opposite of fun. Virtuous behavior can be described as when one's values are aligned with one's aims: to do what one knows is best and to do it gladly. Continent behavior, on the other hand, is when one does what one knows is best, but must do it by opposing one's motivations. Moving from continent to virtuous behavior requires training and some self-discipline.
Four singles were released from the album; the first, "Feedback", was released as a digital download in December 2007. The song reached number nineteen on the Billboard Hot 100 chart, becoming Jackson's best-charting single since 2001's "Someone to Call My Lover". The album's later singles did not share the success of "Feedback". The deluxe version of Discipline contained a DVD documenting the production and promotion of the album and music videos.
"Matte Kudasai" (Japanese:待って下さい) literally means "please wait".
The original release of Discipline featured only one version of "Matte Kudasai", with a guitar part by Robert Fripp that was removed from the track on a subsequent release of the album. The latest versions of the album to be released contains both versions of the song – track 3, "Matte Kudasai", without Robert Fripp's original guitar part; and track 8, "Matte Kudasai (alternative version)", with the guitar part included.