How was Lucifer allowed to sin while in heaven? Isn't heaven a place of perfection and sinlessness? How could sin have entered into Lucifer's mind/heart/spirit if he was in a perfect heaven?
(Revelation 21:4). The sinful are not in heaven, but in the lake of fire (Revelation 21:8). Nothing impure will ever enter heaven (Revelation 21:27). Outside...
Revelation 21:4