Sin and knowledge are linked in the Judeo-Christian tradition. The Bible begins with the story of Adam and Eve, who were expelled from the Garden of Eden for eating from the tree of knowledge of good and evil. As a result of their knowledge, Adam and Eve are made aware of their humanness, that which separates them from the divine and from other creatures. Once expelled from the Garden of Eden, they are forced to toil and to procreate—two “labors” that seem to define the human condition. The experience of Hester and Dimmesdale recalls the story of Adam and Eve because, in both cases, sin results in expulsion and suffering. But it also results in knowledge—specifically, in knowledge of what it means to be human. For Hester, the scarlet letter functions as “her passport into regions where other women dared not tread,” leading her to “speculate” about her society and herself more “boldly” than anyone else in New England. As for Dimmesdale, the “burden” of his sin gives him “sympathies so intimate with the sinful brotherhood of mankind, so that his heart vibrate[s] in unison with theirs.” His eloquent and powerful sermons derive from this sense of empathy. Hester and Dimmesdale contemplate their own sinfulness on a daily basis and try to reconcile it with their lived experiences. The Puritan elders, on the other hand, insist on seeing earthly experience as merely an obstacle on the path to heaven. Thus, they view sin as a threat to the community that should be punished and suppressed. Their answer to Hester’s sin is to ostracize her. Yet, Puritan society is stagnant, while Hester and Dimmesdale’s experience shows that a state of sinfulness can lead to personal growth, sympathy, and understanding of others. Paradoxically, these qualities are shown to be incompatible with a state of purity.

The characters in the novel frequently debate the identity of the “Black Man,” the embodiment of evil. Over the course of the novel, the “Black Man” is associated with Dimmesdale, Chillingworth, and Mistress Hibbins, and little Pearl is thought by some to be the Devil’s child. The characters also try to root out the causes of evil: did Chillingworth’s selfishness in marrying Hester force her to the “evil” she committed in Dimmesdale’s arms? Is Hester and Dimmesdale’s deed responsible for Chillingworth’s transformation into a malevolent being? This confusion over the nature and causes of evil reveals the problems with the Puritan conception of sin. The book argues that true evil arises from the close relationship between hate and love. As the narrator points out in the novel’s concluding chapter, both emotions depend upon “a high degree of intimacy and heart-knowledge; each renders one individual dependent . . . upon another.” Evil is not found in Hester and Dimmesdale’s lovemaking, nor even in the cruel ignorance of the Puritan fathers. Evil, in its most poisonous form, is found in the carefully plotted and precisely aimed revenge of Chillingworth, whose love has been perverted. Perhaps Pearl is not entirely wrong when she thinks Dimmesdale is the “Black Man,” because her father, too, has perverted his love. Dimmesdale, who should love Pearl, will not even publicly acknowledge her. His cruel denial of love to his own child may be seen as further perpetrating evil.

After Hester is publicly shamed and forced by the people of Boston to wear a badge of humiliation, her unwillingness to leave the town may seem puzzling. She is not physically imprisoned, and leaving the Massachusetts Bay Colony would allow her to remove the scarlet letter and resume a normal life. Surprisingly, Hester reacts with dismay when Chillingworth tells her that the town fathers are considering letting her remove the letter. Hester’s behavior is premised on her desire to determine her own identity rather than to allow others to determine it for her. To her, running away or removing the letter would be an acknowledgment of society’s power over her: she would be admitting that the letter is a mark of shame and something from which she desires to escape. Instead, Hester stays, refiguring the scarlet letter as a symbol of her own experiences and character. Her past sin is a part of who she is; to pretend that it never happened would mean denying a part of herself. Thus, Hester very determinedly integrates her sin into her life.

Dimmesdale also struggles against a socially determined identity. As the community’s minister, he is more symbol than human being. Except for Chillingworth, those around the minister willfully ignore his obvious anguish, misinterpreting it as holiness. Unfortunately, Dimmesdale never fully recognizes the truth of what Hester has learned: that individuality and strength are gained by quiet self-assertion and by a reconfiguration, not a rejection, of one’s assigned identity.

In The Scarlet Letter, the town and the surrounding forest represent opposing behavioral systems. The town represents civilization, a rule-bound space where everything one does is on display and where transgressions are quickly punished. The forest, on the other hand, is a space of natural rather than human authority. In the forest, society’s rules do not apply, and alternate identities can be assumed. While this allows for misbehavior— Mistress Hibbins’s midnight rides, for example—it also permits greater honesty and an escape from the repression of Boston. When Hester and Dimmesdale meet in the woods, for a few moments, they become happy young lovers once again. Hester’s cottage, which, significantly, is located on the outskirts of town and at the edge of the forest, embodies both orders. It is her place of exile, which ties it to the authoritarian town, but because it lies apart from the settlement, it is a place where she can create for herself a life of relative peace.

By emphasizing the alternation between sunlight and darkness, the novel organizes the plot’s events into two categories: those which are socially acceptable, and those which must take place covertly. Daylight exposes an individual’s activities and makes him or her vulnerable to punishment. Night, on the other hand, conceals and enables activities that would not be possible or tolerated during the day—for instance, Dimmesdale’s encounter with Hester and Pearl on the scaffold. These notions of visibility versus concealment are linked to two of the book’s larger themes—the themes of inner versus socially assigned identity and of outer appearances versus internal states. Night is the time when inner natures can manifest themselves. During the day, interiority is once again hidden from public view, and secrets remain secrets.

The names in this novel often seem to beg to be interpreted allegorically. Chillingworth is cold and inhuman and thus brings a “chill” to Hester’s and Dimmesdale’s lives. “Prynne” rhymes with “sin,” while “Dimmesdale” suggests “dimness”—weakness, indeterminacy, lack of insight, and lack of will, all of which characterize the young minister. The name “Pearl” evokes a biblical allegorical device—the “pearl of great price” that is salvation. This system of naming lends a profundity to the story, linking it to other allegorical works of literature such as Pilgrim’s Progress and to portions of the Bible. It also aligns the novel with popular forms of narrative such as fairy tales.

The scarlet letter is meant to be a symbol of shame, but instead it becomes a powerful symbol of identity to Hester. The letter’s meaning shifts as time passes. Originally intended to mark Hester as an adulterer, the “A” eventually comes to stand for “Able.” Finally, it becomes indeterminate: the Native Americans who come to watch the Election Day pageant think it marks her as a person of importance and status. Like Pearl, the letter functions as a physical reminder of Hester’s affair with Dimmesdale. But, compared with a human child, the letter seems insignificant, and thus helps to point out the ultimate meaninglessness of the community’s system of judgment and punishment. The child has been sent from God, or at least from nature, but the letter is merely a human contrivance. Additionally, the instability of the letter’s apparent meaning calls into question society’s ability to use symbols for ideological reinforcement. More often than not, a symbol becomes a focal point for critical analysis and debate.

As Dimmesdale stands on the scaffold with Hester and Pearl in Chapter XII, a meteor traces out an “A” in the night sky. To Dimmesdale, the meteor implies that he should wear a mark of shame just as Hester does. The meteor is interpreted differently by the rest of the community, which thinks that it stands for “Angel” and marks Governor Winthrop’s entry into heaven. But “Angel” is an awkward reading of the symbol. The Puritans commonly looked to symbols to confirm divine sentiments. In this narrative, however, symbols are taken to mean what the beholder wants them to mean. The incident with the meteor obviously highlights and exemplifies two different uses of symbols: Puritan and literary.

Although Pearl is a complex character, her primary function within the novel is as a symbol. Pearl is a sort of living version of her mother’s scarlet letter. She is the physical consequence of sexual sin and the indicator of a transgression. Yet, even as a reminder of Hester’s “sin,” Pearl is more than a mere punishment to her mother: she is also a blessing. She represents not only “sin” but also the vital spirit and passion that engendered that sin. Thus, Pearl’s existence gives her mother reason to live, bolstering her spirits when she is tempted to give up. It is only after Dimmesdale is revealed to be Pearl’s father that Pearl can become fully “human.” Until then, she functions in a symbolic capacity as the reminder of an unsolved mystery.

The narrator chooses to begin his story with the image of the rosebush beside the prison door. The rosebush symbolizes the ability of nature to endure and outlast man’s activities. Yet, paradoxically, it also symbolizes the futility of symbolic interpretation: the narrator mentions various significances that the rosebush might have, never affirming or denying them, never privileging one over the others.