If God created all the angels, and Lucifer was one of His brightest ones, how could he rebel? Did God make a mistake in creating Lucifer? God is perfect, so how could He make something like the angel Lucifer that would later rebel? And not only Lucifer, but 1/3 of the angels went with him. And these angels are now demons. They are the complete opposite of God's angels. They no longer have any of God's characteristics within them. They are pure evil. Did God withdraw all of His presence from them and they turned into angel opposites? Evil did not exist before this. God for knew that Adam would sin. So why not Lucifer? Was this supposed to happen? Was this a mistake? I have come to the conclusion that we cannot know the answers to this. It's probably part of God's plan for us to think about from this exact perspective and to chalk it up as "just trust in Him".