Lyric discussion by k0s 

Cover art for Feng Shui lyrics by Gnarls Barkley

Saltpeter is ridiculously far off, not even on the same continent... it's got nothing to do with OCD. It's a song about aesthetics, as Cee-Lo himself admits to being very concious of what he wears etc (read some interviews). The idea is every move you make, every word you say is part of who you are and to lead a good life its components must strive towards perfection. And it's all about realizing this while maintaining the proper sense of perspective so as not to be superficial or self concious. It's the sort of persepective you need to create art / music. I'd say the creative mindset is the most prevalent theme of the album and NOT mental illness, though the two are related, no?