How we cite our quotes: (Act.Paragraph)
Quote #4
HELENA: Doctor, does Radius have a soul?
DR. GALL: I don't know. He's got something nasty. (1.270-271)
Souls are usually thought of as good things. Then, again, if you're a ruler, you don't necessarily want your servants to be human beings with desires and concerns and possible thoughts. What makes humans human is often nasty. But at the same time, there's something nasty about those with power being upset that their workers are human.
Quote #5
All inventions are against the will of God. It's nothing short of blasphemy to want to take over for Him and improve the world. (1.328)
Nana doesn't just dislike robots; she thinks it's blasphemous to invent anything, or use any tools. Any progress is evil in her eyes. Taken to an extreme, this seems like it means that humans shouldn't try to help each other, since that would be blasphemously trying to improve the world. Nana's vision of religion seems somewhat untrustworthy, though she's probably right that God disapproves of building robots that destroy the world.
Quote #6
NANA: On your knees! The hour of judgment is upon us!
HALLEMEIER: Thunder, you're still alive!
NANA: Repent, you unbelievers! The end of the world is come! Pray! (2.355-357)
This is probably supposed to be somewhat funny. Nana's over-the-top warnings of apocalypse, and Hallemeier's distress that she's still alive and burbling, would most likely get some laughs in a theater. Nana, and religion in general, are presented as amusing and a joke—but then again, the play does sometimes seem to believe in God, and to believe that the robots violate God's plan.