Here is the answer, directly quoted from Paper 53 of the book:

THE LUCIFER MANIFESTO

Whatever the early origins of trouble in the hearts of Lucifer and Satan, the final outbreak took form as the Lucifer Declaration of Liberty. The cause of the rebels was stated under three heads:

1. The reality of the Universal Father. Lucifer charged that the Universal Father did not really exist, that physical gravity and space-energy were inherent in the universe, and that the Father was a myth invented by the Paradise Sons to enable them to maintain the rule of the universes in the Father’s name. He denied that personality was a gift of the Universal Father. He even intimated that the finaliters were in collusion with the Paradise Sons to foist fraud upon all creation since they never brought back a very clear-cut idea of the Father’s actual personality as it is discernible on Paradise. He traded on reverence as ignorance. The charge was sweeping, terrible, and blasphemous. It was this veiled attack upon the finaliters that no doubt influenced the ascendant citizens then on Jerusem to stand firm and remain steadfast in resistance to all the rebel’s proposals.

2. The universe government of the Creator Son–Michael. Lucifer contended that the local systems should be autonomous. He protested against the right of Michael, the Creator Son, to assume sovereignty of Nebadon in the name of a hypothetical Paradise Father and require all personalities to acknowledge allegiance to this unseen Father. He asserted that the whole plan of worship was a clever scheme to aggrandize the Paradise Sons. He was willing to acknowledge Michael as his Creator-father but not as his God and rightful ruler.

Most bitterly did he attack the right of the Ancients of Days–“foreign potentates”–to interfere in the affairs of the local systems and universes. These rulers he denounced as tyrants and usurpers. He exhorted his followers to believe that none of these rulers could do aught to interfere with the operation of complete home rule if men and angels only had the courage to assert themselves and boldly claim their rights.

He contended that the executioners of the Ancients of Days could be debarred from functioning in the local systems if the native beings would only assert their independence. He maintained that immortality was inherent in the system personalities, that resurrection was natural and automatic, and that all beings would live eternally except for the arbitrary and unjust acts of the executioners of the Ancients of Days.

3. The attack upon the universal plan of ascendant mortal training. Lucifer maintained that far too much time and energy were expended upon the scheme of so thoroughly training ascending mortals in the principles of universe administration, principles which he alleged were unethical and unsound. He protested against the agelong program for preparing the mortals of space for some unknown destiny and pointed to the presence of the finaliter corps on Jerusem as proof that these mortals had spent ages of preparation for some destiny of pure fiction. With derision he pointed out that the finaliters had encountered a destiny no more glorious than to be returned to humble spheres similar to those of their origin. He intimated that they had been debauched by overmuch discipline and prolonged training, and that they were in reality traitors to their mortal fellows since they were now co-operating with the scheme of enslaving all creation to the fictions of a mythical eternal destiny for ascending mortals. He advocated that ascenders should enjoy the liberty of individual self-determination. He challenged and condemned the entire plan of mortal ascension as sponsored by the Paradise Sons of God and supported by the Infinite Spirit.

And it was with such a Declaration of Liberty that Lucifer launched his orgy of darkness and death. 53:3.0