[[image:discipline.jpg|thumb|''Discipline Track Art'']]
'''"Discipline"''' is a single from [[Nine Inch Nails]], and also the fourth track on Halo 27, ''[[The Slip]].'' It contains a beat reminiscent of "[[Only (song)|Only]]" from 2005's ''[[With Teeth (halo)|With Teeth]]'', and its lyrics seem to have a sado-masochistic overtone.
The song was released to radio stations simultaneously around 2:30pm EST on April 22, 2008, being mastered only the day before, and was then made available as a free download via the official Nine Inch Nails website. When downloaded, it comes with track art and a note found in the comments box of the song info saying "Go to [[nin.com|www.nin.com]] on May 5", which was the release date of the then-unannounced album ''The Slip.'' The lyrics are also contained.
==Appearances==
===Halos===
*''[[The Slip]]''
===Seeds===
===Discipline (Multitrack combined version)===
The version available at [[remix.nin.com]] in the form of seperate multitracks is 5:08 when combined, and does not fade out. Instead, the outro continues for an additional 3½ measures before abruptly coming to a halt.
===Discipline (Live At Rehearsals)===
==Live==
'''Discipline''' became a live staple since it debuted on the Lights In The Sky Tour, with no significant changes from the album version, save an extended outro.
==Lyrics==