Final answer:
Satan says that he and his fallen angels will enjoy a freedom unlike the angels in Heaven, being rulers of their own free will in Hell, a bitter form of independence.
Step-by-step explanation:
Around line 249, Satan expresses that he and his fallen angels will have a certain type of freedom that the angels still in heaven do not enjoy. In their rebellion and subsequent fall from Heaven, they have become rulers of their own realm in Hell, free from the servility and obedience that characterizes the existence of the angels in Heaven.
This freedom, while coming at the cost of being eternally ostracized from the divine presence, is portrayed as a form of dark triumph, as Satan and his minions have the liberty to exercise their own wills without divine interference.
Conversely, the angels in Heaven continue to serve God in blissful happiness, but their wills are aligned with His, thus lacking the independence that Satan so values. The text suggests themes of autonomy, authority, and perhaps a twisted sort of happiness in defiance, contrasting sharply with the divine order and joy experienced by those in Heaven.