Lyric discussion by aviatorbrisbane 

Cover art for Discipline lyrics by Nine Inch Nails

Does it have to be about any one thing in particular?

I can see how it alludes to drugs, and sex, eating... whatever!

Addiction, whether to drugs, sex (pretty much a drug release in the brain as well, right?) it all requires 'discipline' to stop yourself.

When it says 'left a mark' it can mean past tense, as in in his past.

Even suggesting he is addicted to food is laughable... totally irrelevant.

I agree, this song is about whatever one needs discipline in, and although I certainly think Trent did not write this about food, it could very well apply to someone who binge eats. Love the song!

I'll try to restrain myself from rambling. I agree with you people. Trent seems to be addressing a discipline in a rather broad sense. Although I can see it as a satirical/ sarcastic view of society as well. It was the first song that really stood out on The Slip when I first listened. It still does, but Lights in the Sky has really grown on me now... A lot.