Lyric discussion by femme_en_gris 

Cover art for Black Saturday lyrics by Soundgarden

I can't believe I'm the only one who thinks this is somehow political.

"Kill me right away if I start to listen To the voices Telling all the mouths what they need to swallow"

Those voices tell "all the mouths", in other words, they want to have some kind of normative power over everyone. The words "need" and "swallow" also seem to imply that it isn't a suggestion, but some kind of obligation or even an order. (Though I'm not sure to which voices he's exactly referring. It could be cultural norms, the government, etc.) The fact that he would rather die than listening to those voices seems to imply that he thinks that submiting to the status quo is immoral and unthinkable.

The chorus probably means that he'd rather be ostracized and temporally forgotten than to remain in such a corrupt/immoral form. That way, he would realize his mistakes and become able to correct himself, being "born again".

My Interpretation