I don't do well with absolutes, as you can probably tell by the "Greatness/Mediocrity" couplet. But the majority of my family is capable of believing the Bible has all the answers. My uncle once thanked God for the "ties we share not just of blood, but of faith," as if belief were a genetic inevitability like light eyes or wide hips.
Faith is a wonderful thing but one that requires that I exert myself to find. In some ways it would have been easier if I despised it. But instead I doubted, and doubting is hard, and I wished I didn't. I never felt like I fit into either the saintly or wild preacher's daughter archetypes, so I felt like I fraud. I staged small rebellions by listening to rock music and dyeing weird streaks in my hair.
This song, like several on the second half of the album, is about stepping outside the saint vs. prodigal narrative. It's about solidarity with the doubters and the beauty of not having all the answers. It's about coming as you are.