Lyric discussion by Jareth 

Cover art for Mustard Seed lyrics by Kidney Thieves, The

When I really listen to the lyrics I think that it might be about someone who has suffered a rape and her thoughts in retrospect in how she's been affected.

"Cursed upon me, a mustard seed was good enough for him and its good enough to me Pillar of salt, shaker of black Killer of thought, turning my back Believe you were wrong and said they would laugh and I'm trying to be humble about it"

The last part about believing he was wrong and him warning her that if she tells someone they'll all laugh at her and how she's humbled and embarrassed by it.

I definitely think that this song is about a rape survivor.