Everyone's delusional in some sense. So long as they are entertaining to talk to, I'm fine.
If they want to convert me, I'd dump them-- not because the attempt to convert is that bothersome, but because that's so unoriginally, stereotypical X-tian: I don't have time to befriend an entire clone army.
If they want to convert me, I'd dump them-- not because the attempt to convert is that bothersome, but because that's so unoriginally, stereotypical X-tian: I don't have time to befriend an entire clone army.