Lucifer wasn't in the actual heaven. He was an angelic overseer of 45 planets that were heavenly because he bore the light of God and was nicknamed "Light Bearer". He was top 200 most intelligent of his species of 1 million of that angelic type. He worked with Jesus, Gabriel, Melchizedeks and other high level White Hats to develop the universe. His ego got so big that he was convinced that he could hijack the 45 planets for himself. He setup a long plot of slowly manipulating his team (he tricked 1/3 of 1 Battalion of Angels). Then he rebelled and was eventually thrown into a low vibe area we call "hell". So there is no way of leaving hell unless they boost up their morals again so instead, they found a way to expand hell. When they hijacked the planets, they made them so evil that the energy became similar to the actual hell. This allowed them to travel through these low vibe areas. But as soon as a planet reverses course (repents) and goes back towards morality and goodness, the area is lost for the demons who have to retreat back to the darker parts of hell. So they make Politicians and high level Humans/Reptilians filthy rich and powerful. In exchange, they lower the vibe of the planet making it as hellish as possible so that one day the demons can move through the area freely. In fact, it was that bad on Earth at one point. Later it was only bad enough for demons to possess humans without permission. After Jesus, the World got better and now the only way possession can occur is through ritual invitation. The possessed go through their internal hell 24/7 for life but they get rich. Sometimes they die fast and so it was all for nothing. Selling the soul means reversing course on the souls development back to stage 1 which is the most Spiritually ignorant mode of low wisdom. Low wisdom leads to many errors and errors (sin) leads to bad consequences. Can you believe these people sold their souls all for money? Is it worth it? Of course not. Now after death, they go to an actual hell where the demon that possessed them uses them as a battery and the more they torment that soul, the more battery juice is squeezed out of them. The Matrix movie was based on this concept. The Architect in the movie is the group on Saturn that developed the modern day system.