Old Man Jones
Old Man Jones is an affiliate connected to Horley and Samson Finsh. He is observing your actions and serves as your moral guide. He preaches that achieving redemption is possible if sought but also says more cynical statements regarding the conflicts and individuals around him.
First you encounter Jones as you meet with Horley in Blackwater. As you return to Horley after the first three honor-missions with high honor, Jones will suggest you meet Marshal Tom Davis. As you return with low honor Jones will suggest you meet with Samson Finch. You'll meet Jones another time when you visit Madam Nazar for the first time.
Honor
You can visit Old Man Jones at his camp west of Annesburg, south of Armadillo and near Riggs Station. For 3 Gold Bars you can instantly gain maximum high honor or maximum low honor.
If you don't want to spend any gold to increase your honor, you can also groom your horse or play honorable Free Roam Missions. To decrease your honor without paying gold to Jones, play dishonorable Free Roam Missions or shoot everyone you come accross.