Lyric discussion by The_Ruiner 

Cover art for Demon Seed lyrics by Nine Inch Nails

well im thinking hes talking about that Zeit Geist shit, or whatever, something about how we are all going to have to use little ID chips under our skin

"it keeps growing and i can feel it breathe i have been trying to behave myself"

Its taking over him, and behaving himself is the only way to stay in check with the law/government cause apparently if your ID tag doesn't work or you do something THEY don't want you to, they can cut it off, and when you are ID'd and nothing comes up you can be tried as a terrorist or just killed.

"it keeps growing and i can feel it breathe i have been trying to tolerate you" hes been trying to stay in line

"well i am reaching the point" hes almost going to snap(obviously)

"i thought maybe i thought this would go away but it continues the only constant every day stronger"

he feels that he 'could' get used to it but its just getting harder and harder everyday (and i think this is where "Everyday Is Exactly The Same" comes into play)

"i will use my voice and i will use my fist to destroy everything i can" he feels that he HAS to take a stand, and change things

"now i know what this is all about now i know exactly what i am" well heres what i think, in the song from 3:33 to 4:14 hes been drugged or brainwashed into forgetting what he was supposed to do, and he know knows what his "purpose" is

"there is a seed inside of me (keeps growing)" hes realizing again that the seed(Chip) inside of him keeps taking over and i think it might start all over again (the process)

well thats what i think and i did notice there were some lyrics up there that weren't really in the song but oh well