toh6wy said:
What happens if you try to sin in heaven?
Just warning you, my time on here is limited, so if this turns into a long debate, I might not be able to finish it. (I'll be back on for good in a week or so, though)
Simply put, you can't, or rather, won't. You will have no inclination to.
As for Lucifer, angels still have free will. (Or had, as some believe angels actually only had the decision to accept or deny God that once; I think that's ridiculous, but some believe it) He chose to rebel against God.
Sorry if that wasn't clear, my mind is a bit fried today. Basically, humans have free will to choose moral choices here on Earth - then we deal with them after we die. Angels like Lucifer, on the other hand, have free will in Heaven, then have to deal with their choice after the Judgement. Basically, we're similar in that we each have a place where we make choices, then we deal with them later, the difference is in the original place where we make the choices.
And technically speaking, I'm pretty sure the Heaven Lucifer was thrown out of is not the New Earth God is creating for humans to live on after the Judgement. Don't ask for a verse on that though, like I said, my mind is fried.