Humpty Dumpty sat on a wall.
Humpty Dumpty had a great fall.
All the king's horses and all the king's men
Couldn't put Humpty Dumpty together again.
"Lucifer was a brilliant primary Lanonandek Son of Nebadon. He had experienced service in many systems, had been a high counselor of his group, and was distinguished for wisdom, sagacity, and efficiency."
Of Lucifer it was said: "Your heart was lifted up because of your beauty; you corrupted your wisdom because of your brightness." Your olden prophet saw his sad estate when he wrote: "How are you fallen from heaven, O Lucifer, son of the morning! How are you cast down, you who dared to confuse the worlds!" Paper 53
There is an order to the heavens and we are watched over by God and divine beings. Lucifer and Satan were real and the natural order of our world was affected when they chose to experience evil. The potential for evil is part of free will but it isn't necessary to experience it. When one being, human or divine, decides to exercise that part of their existence it affects everyone else, and that is what has happened to our world. Lucifer and Satan are no longer present but the repercussions they created are still with us today. From the Chief of Seraphim stationed here with us:
“Your isolated world is not forgotten in the counsels of the universe. Urantia is not a cosmic orphan stigmatized by sin and shut away from divine watchcare by rebellion. From Uversa to Salvington and on down to Jerusem, even in Havona and on Paradise, they all know we are here; and you mortals now dwelling on Urantia are just as lovingly cherished and just as faithfully watched over as if the sphere had never been betrayed by a faithless Planetary Prince, even more so. It is eternally true, "the Father himself loves you." Paper 114:7
More about the Lucifer rebellion can be found in Papers 53 and 54.