
Mickey
In the final game, Arthur's main goal is to help people. At the same time, he sincerely believes that he did not deserve the return of kindness. He does not consider it an atonement, nor does he seek to cure his terminal illness; he simply wants to help.
In the story, he periodically meets a war veteran, Mickey. Their conversations are short, and most of the time Arthur just listens to Mickey, who just needs to talk.

Charlotte
A woman who has lost her husband is left alone in the middle of nowhere. Charlotte would have been doomed if not for Arthur, who decided to help her. He teaches her how to hunt, and also gives valuable advice on how to stand up for herself. A grateful woman invites him to dinner and calls him good, at which point Arthur begins to have coughing fits.

Woman on the road
While exploring the area beyond van horn's border, Morgan meets the McMurphy gang. This happens just at the moment when the bandits attack the crew and are going to kill the woman. Arthur helps her out of trouble and takes her to van horn. The woman is grateful to him for this, and for the first time, Morgan realizes that he did not do a good thing for himself, which is reflected later in his diary.

A man and his dog
Not far from Strawberry, Arthur meets a sad young man who has lost his pet dog. He decides to help the guy and finds the animal in the rocks, near the meeting place with its owner. Watching the reunion of two friends, Morgan comes to think that he likes to be good, and he is proud of himself.
Evelyn Miller
Arthur accepts the fact that he is a good and kind person, and really regrets that he did not have time to do more positive things in his life. Emotions are more prevalent here than a rational approach. Evelyn Miller also helps him come to this conclusion when passing one of the third-party quests in RDR 2.

If we look again at the final entry in Arthur's journal, we can see a similarity to one of the quotations in Miller's treatise:
"Oh, there are many fools who strive for something more. Our most humiliating burden."
That is, Evelyn is not ready to admit love for his own actions, his emotional framework is limited by reason.
At the same time, he, like the main character, tries to find out, based on his experience, why he is unhappy. But, unfortunately, he can't do it. It is because of the narrowness of his views that he falls into the circle of thought from which he is trying to get out. Unlike Arthur, who doesn't ask himself why he does good things. He accepted it and just acts.
Read Dead Redemption 2-a game with a deep meaning. This is a true story of redemption, and the evidence for this can be found not only in the main plot, but also in seemingly inconspicuous details.