Lyric discussion by darkcutter13 

Cover art for Diluted lyrics by Slipknot

I think that this song is about being really depressed and hating yourself and just feeling like your being eatin alive by your mind. Then people saying they knew you where upset but now only bring it up that its too late. Also maybe hes trying to hide his past or feelings from others.... "I keep my scars from prying eyes" But whatever the song means it's definitly my favorite song by Slipknot!

@darkcutter13 I have a similar interpretation to you. Not sure if it is about depression per se, but at least the struggles in their life.