Discipline Nine Inch Nails

[Verse 1]
Am I—
Am I still tough enough?
Feels like I'm wearing down, down, down, down, down
Is my viciousness
L-Losing ground, ground, ground, ground, ground?
Am I taking too much
Did I cross a line, line, line?
I need my role in this
Very clearly defined

[Chorus]
I need your discipline
I need your help
I need your discipline
You know once I start I cannot help myself

[Verse 2]
And now it's starting up
Feels like I'm losing touch
Nothing matters to me
Nothing matters as much
I see you left a mark
Up and down my skin, skin, skin
I don't know where I end
And where you begin