Here we see no one is brave enough to accept the task upon which the fate of their kind rests, no one but Satan that is. In the lines that come after, Satan offers to take up the role that no one else would, and in doing so he showcases heroism -he has the courage that others lacked. Yes, one could argue that doing evil deeds are not the hallmark of a hero, but one would have to concede that taking on a task that no one else is willing to take on has to be considered heroic.

Here, we can see one more reason as to why Satan and his army might be displeased with God - humans even though less in power and excellence than them are said to be more favored. One could place themselves in the position of Satan and, perhaps, to a degree understand why Satan felt undervalued by God, when "lesser" beings were being given more attention.

Here we see Beelzebub described in a grand manner, almost, as if he was someone to be admired; Milton seems to devote a good amount of time, initially, to set up the motives of the "evil" characters, and in doing so makes them easier to understand and feel sympathy for. While they are not without flaws, we do see them feeling the pain of being thrown out of heaven and that humanizes them in our eyes.

Here we see Satan has not given up, even after facing immense hardship and the loss of the comforts of Heaven. In a way, one could see this as Satan exhibiting bravery and believing in his convictions. In Satan's mind, in order to get even, he is trying to pervert God's intended purpose (by reveling in causing "evil") and bringing grief to his cretor. One could, perhaps, in a way even sympathize with Satan for a bit, Satan, after all, felt shackled and limited by the will of God, and wanted to break free. The rebellious spirit of Satan is strangely relatable, and people often experience a rebellious phase during the teenage years.