P609:4, 53:8.1 Lucifer and Satan freely roamed the Satania system until the completion of the bestowal mission of Michael on Urantia. They were last on your world together during the time of their combined assault upon the Son of Man.
P609:5, 53:8.2 Formerly, when the Planetary Princes, the "Sons of God," were periodically assembled, "Satan came also," claiming that he represented all of the isolated worlds of the fallen Planetary Princes. But he has not been accorded such liberty on Jerusem since Michael's terminal bestowal. Subsequent to their effort to corrupt Michael when in the bestowal flesh, all sympathy for Lucifer and Satan has perished throughout all Satania, that is, outside the isolated worlds of sin.
P609:6, 53:8.3 The bestowal of Michael terminated the Lucifer rebellion in all Satania aside from the planets of the apostate Planetary Princes. And this was the significance of Jesus' personal experience, just before his death in the flesh, when he one day exclaimed to his disciples, "And I beheld Satan fall as lightning from heaven." He had come with Lucifer to Urantia for the last crucial struggle.
P609:7, 53:8.4 The Son of Man was confident of success, and he knew that his triumph on your world would forever settle the status of his agelong enemies, not only in Satania but also in the other two systems where sin had entered. There was survival for mortals and security for angels when your Master, in reply to the Lucifer proposals, calmly and with divine assurance replied, "Get you behind me, Satan." That was, in principle, the real end of the Lucifer rebellion. True, the Uversa tribunals have not yet rendered the executive decision regarding the appeal of Gabriel praying for the destruction of the rebels, but such a decree will, no doubt, be forthcoming in the fullness of time since the first step in the hearing of this case has already been taken.
P610:1, 53:8.5 Caligastia was recognized by the Son of Man as the technical Prince of Urantia up to near the time of his death. Said Jesus: "Now is the judgment of this world; now shall the prince of this world be cast down." And then still nearer the completion of his lifework he announced, "The prince of this world is judged." And it is this same dethroned and discredited Prince who was once termed "God of Urantia."
P610:2, 53:8.6 The last act of Michael before leaving Urantia was to offer mercy to Caligastia and Daligastia, but they spurned his tender proffer. Caligastia, your apostate Planetary Prince, is still free on Urantia to prosecute his nefarious designs, but he has absolutely no power to enter the minds of men, neither can he draw near to their souls to tempt or corrupt them unless they really desire to be cursed with his wicked presence.
P610:3, 53:8.7 Before the bestowal of Michael these rulers of darkness sought to maintain their authority on Urantia, and they persistently withstood the minor and subordinate celestial personalities. But since the day of Pentecost this traitorous Caligastia and his equally contemptible associate, Daligastia, are servile before the divine majesty of the Paradise Thought Adjusters and the protective Spirit of Truth, the spirit of Michael, which has been poured out upon all flesh.
P610:4, 53:8.8 But even so, no fallen spirit ever did have the power to invade the minds or to harass the souls of the children of God. Neither Satan nor Caligastia could ever touch or approach the faith sons of God; faith is an effective armor against sin and iniquity. It is true: "He who is born of God keeps himself, and the wicked one touches him not."
P610:5, 53:8.9 In general, when weak and dissolute mortals are supposed to be under the influence of devils and demons, they are merely being dominated by their own inherent and debased tendencies, being led away by their own natural propensities. The devil has been given a great deal of credit for evil which does not belong to him. Caligastia has been comparatively impotent since the cross of Christ.