"I am the first light, the Morningstar." Lucifer comments. "In the beginning God said let there be light and light came into the darkness to make day and night. I was that light."

Lucifer disliked the bible but in this situation it wasn't a bad way to get a human to understand the situation.

"Unfortunately, I have to hide most of my beauty from you. It would be a shame to blind you with it." Lucifer picks up on it and finds no issue with a playful flirt. He did it with Ziggy too.