The Question and Answer section for The Count of Monte Cristo is a great resource to ask questions, find answers, and discuss the novel.
This is very much a thematic question. Vengeance and forgiveness is certainly a theme. Dantes found power and catharsis in revenge but he found more of a sense of peace through forgiveness.
Dantes suggests they all attend a public execution in the square. This prompts a discussion of various methods of executions, a topic that the Count knows a great deal about. He tells Albert that he does not find decapitation a suitable...
Dantès was a captain's mate when the ship left.