Hawthorne shows that when a person makes a wrong decision, it causes the person to go through great pains to revert back to the right decision. This is a key point in Hawthorne's story: where making a wrong decision can cost a person dearly.
It is important to realize that a sin can, and more often than not will, involve more than one person. Just like in a corrupted society, the crime will involve both the corrupted and the corrupter to sin. Hawthorne demonstrates, through Hester Prynne and Arthur Dimmesdale, that usually a sin involves a number of people. Arthur Dimmesdale is a highly regarded Puritan clergyman in the town of Boston, and he is the person whom Hester commits adultery with. To fulfill Hester's dream of having a relationship with love, Dimmesdale is pulled in to sin along with Hester. Since then, he is constantly tortured by his conscience for hiding it from the town. By committing the sin of hiding his wrongdoing from the town, Dimmesdale is an untrue man and "To the untrue man, the whole universe is false - it is impalpable - it shrinks to nothing within his grasp"(131). Due to Hester's enticement, "[Dimmesdale is] driven by the impulse of that Remorse which dog[s] him everywhere"(133), and "Cowardice invariably [draws] him back, with [its] tremulous gripe, just when the [Remorse] hurrie[s] him to the verge of a disclosure"(133). He is afraid to admit his sins because he desires to maintain his high status; he hence continues to sin even more by trying to cover up the sin he committed earlier on. Hawthorne demonstrates how a sinner, who is enticed by another sinner, may commit a deeper sin, and suffer even more.
In addition to bringing down others to sin, sinners also selfishly sacrifice the innocent. Hawthorne believes that sinners topple the innocent to survive through their, the sinners", suffering. Besides bringing Dimmesdale down, Hester also brings down Pearl - causing Pearl to suffer along with her.