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.

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.

Adam is a strong, intelligent, and rational character possessed of a remarkable relationship with God. In fact, before the fall, he is as perfect as a human being can be. He has an enormous capacity for reason, and can understand the most sophisticated ideas instantly. He can converse with Raphael as a near-equal, and understand Raphael’s stories readily. But after the fall, his conversation with Michael during his visions is significantly one-sided. Also, his self-doubt and anger after the fall demonstrate his new ability to indulge in rash and irrational attitudes. As a result of the fall, he loses his pure reason and intellect.

Adam’s greatest weakness is his love for Eve. He falls in love with her immediately upon seeing her, and confides to Raphael that his attraction to her is almost overwhelming. Though Raphael warns him to keep his affections in check, Adam is powerless to prevent his love from overwhelming his reason. After Eve eats from the Tree of Knowledge, he quickly does the same, realizing that if she is doomed, he must follow her into doom as well if he wants to avoid losing her. Eve has become his companion for life, and he is unwilling to part with her even if that means disobeying God.

Adam’s curiosity and hunger for knowledge is another weakness. The questions he asks of Raphael about creation and the universe may suggest a growing temptation to eat from the Tree of Knowledge. But like his physical attraction to Eve, Adam is able to partly avoid this temptation. It is only through Eve that his temptations become unavoidable.

Created to be Adam’s mate, Eve is inferior to Adam, but only slightly. She surpasses Adam only in her beauty. She falls in love with her own image when she sees her reflection in a body of water. Ironically, her greatest asset produces her most serious weakness, vanity. After Satan compliments her on her beauty and godliness, he easily persuades her to eat from the Tree of Knowledge.

Aside from her beauty, Eve’s intelligence and spiritual purity is constantly tested. She is not unintelligent, but she is not ambitious to learn, content to be guided by Adam as God intended. As a result, she does not become more intelligent or learned as the story progresses, though she does attain the beginning of wisdom by the end of the poem. Her lack of learning is partly due to her absence for most of Raphael’s discussions with Adam in Books V, VI, and VII, and she also does not see the visions Michael shows Adam in Books XI and XII. Her absence from these important exchanges shows that she feels it is not her place to seek knowledge independently; she wants to hear Raphael’s stories through Adam later. The one instance in which she deviates from her passive role, telling Adam to trust her on her own and then seizing the fruit of the Tree of Knowledge, is disastrous.

Eve’s strengths are her capacity for love, emotion, and forebearance. She persuades Adam to stay with her after the fall, and Adam in turn dissuades her from committing suicide, as they begin to work together as a powerful unit. Eve complements Adam’s strengths and corrects his weaknesses. Thus, Milton does not denigrate all women through his depiction of Eve. Rather he explores the role of women in his society and the positive and important role he felt they could offer in the divine union of marriage.

An omniscient, omnipresent, and omnipotent character who knows everything before it happens. Attempting to present such an unimaginable character accurately, Milton appropriates several of God’s biblical speeches into his speeches in Paradise Lost. God loves his creation and strongly defends humankind’s free will. He presents his love through his Son, who performs his will justly and mercifully.

God, in Paradise Lost, is less a developed character than a personification of abstract ideas. He is unknowable to humankind and to some extent lacks emotion and depth. He has no weaknesses, embodies pure reason, and is always just. He explains why certain events happen, like Satan’s decision to corrupt Adam and Eve, tells his angels what will happen next, and gives his reasoning behind his actions in theological terms. God allows evil to occur, but he will make good out of evil. His plan to save humankind by offering his Son shows his unwavering control over Satan.

For Milton, the Son is the manifestation of God in action. While God the Father stays in the realm of Heaven, the Son performs the difficult tasks of banishing Satan and his rebel angels, creating the universe and humankind, and punishing Satan, Adam and Eve with justice and mercy. The Son physically connects God the Father with his creation. Together they form a complete and perfect God.

The Son personifies love and compassion. After the fall, he pities Adam and Eve and gives them clothing to help diminish their shame. His decision to volunteer to die for humankind shows his dedication and selflessness. The final vision that Adam sees in Book XII is of the Son’s (or Jesus’) sacrifice on the cross—through this vision, the Son is able to calm Adam’s worries for humankind and give Adam and Eve restored hope as they venture out of Paradise.