Some readers consider Satan to be the hero, or protagonist, of the story, because he struggles to overcome his own doubts and weaknesses and accomplishes his goal of corrupting humankind. This goal, however, is evil, and Adam and Eve are the moral heroes at the end of the story, as they help to begin humankind’s slow process of redemption and salvation. Satan is far from being the story’s object of admiration, as most heroes are. Nor does it make sense for readers to celebrate or emulate him, as they might with a true hero. Yet there are many compelling qualities to his character that make him intriguing to readers.

Read about William Blake’s Songs of Innocence and Experience, another work that explores a heroic interpretation of Satan.

One source of Satan’s fascination for us is that he is an extremely complex and subtle character. It would be difficult, perhaps impossible, for Milton to make perfect, infallible characters such as God the Father, God the Son, and the angels as interesting to read about as the flawed characters, such as Satan, Adam, and Eve. Satan, moreover, strikes a grand and majestic figure, apparently unafraid of being damned eternally, and uncowed by such terrifying figures as Chaos or Death. Many readers have argued that Milton deliberately makes Satan seem heroic and appealing early in the poem to draw us into sympathizing with him against our will, so that we may see how seductive evil is and learn to be more vigilant in resisting its appeal.

Milton devotes much of the poem’s early books to developing Satan’s character. Satan’s greatest fault is his pride. He casts himself as an innocent victim, overlooked for an important promotion. But his ability to think so selfishly in Heaven, where all angels are equal and loved and happy, is surprising. His confidence in thinking that he could ever overthrow God displays tremendous vanity and pride. When Satan shares his pain and alienation as he reaches Earth in Book IV, we may feel somewhat sympathetic to him or even identify with him. But Satan continues to devote himself to evil. Every speech he gives is fraudulent and every story he tells is a lie. He works diligently to trick his fellow devils in Hell by having Beelzebub present Satan’s own plan of action.

Satan’s character—or our perception of his character—changes significantly from Book I to his final appearance in Book X. In Book I he is a strong, imposing figure with great abilities as a leader and public statesmen, whereas by the poem’s end he slinks back to Hell in serpent form. Satan’s gradual degradation is dramatized by the sequence of different shapes he assumes. He begins the poem as a just-fallen angel of enormous stature, looks like a comet or meteor as he leaves Hell, then disguises himself as a more humble cherub, then as a cormorant, a toad, and finally a snake. His ability to reason and argue also deteriorates. In Book I, he persuades the devils to agree to his plan. In Book IV, however, he reasons to himself that the Hell he feels inside of him is reason to do more evil. When he returns to Earth again, he believes that Earth is more beautiful than Heaven, and that he may be able to live on Earth after all. Satan, removed from Heaven long enough to forget its unparalleled grandeur, is completely demented, coming to believe in his own lies. He is a picture of incessant intellectual activity without the ability to think morally. Once a powerful angel, he has become blinded to God’s grace, forever unable to reconcile his past with his eternal punishment.