This is quoted from the novel White Single Woman.
“So I’m a fucking sinner! Who are you, Mother Teresa? Isn’t a human being allowed one mistake? For God’s sakes, are you shooting for the ministry? I need you, Allie!”
I looked up "Shoot for". It means "To strive for something; to aspire to some goal. "
But I can't understand "shooting for the ministry". I think "ministry" means the department of one sector. Such as Ministry of Agriculture, Ministry of Foreign Affairs ...