One consequence of sin in this novel is isolation. What are three passages that indicate the isolation of the major three characters, Hester,...

For Hester, her scarlet letter seems to set her apart in every possible way. She even lives apart from the remainder of her community in a small cottage surrounded by "scrubby trees" that seem as though they exist in order to conceal something. Moreover,

In all her intercourse with society [...] there was nothing that made her feel as if she belonged to it. Every gesture, every word, and even the silence of those with whom she came in contact, implied, and often expressed, that she was banished, and as much alone as if she inhabited another sphere, or communicated with the common nature by other organs and senses than the rest of human kind.

Even when Hester would stand in a crowd, there seemed to exist a sort of magic circle around her, into which no one else would come. She even found that she was sometimes the subject of the Sunday sermon. She became completely alienated in almost every way: religiously, geographically, legally.

As far as Dimmesdale, because his sin is not known, his isolation is of a different, invisible sort. One day, Hester

[...] beheld the minister advancing along the path entirely alone, and leaning on a staff which he had cut by the wayside. He looked haggard and feeble, and betrayed a nerveless despondency in his air, which had never so remarkably characterized him in his walks about the settlement, nor in any other situation where he deemed himself liable to notice.

Thus, Dimmesdale has been isolated by his guilt, and because he has hidden his guilt, he purposely conceals his misery (for it is his guilt that makes him so terribly unhappy), and so becomes emotionally isolated from everyone around him.

For Chillingworth, his single-minded purpose, to exact ultimate revenge on Hester's co-sinner, forces him to become emotionally isolated as well. He must operate in secret, attempting to ferret out precisely what the minister most wants to conceal, and so he has time for little else. The two men even move in together, further isolating them both. Chillingworth's "intimate revenge" requires intense focus and, thus, demands exclusivity.