In this excerpt from "The Fortune of War" by Patrick O'Brian, Stephen observes a stark transformation in a person's character when they transition from land to sea. He notes that while the individual is generally agreeable on land, once they are on the water, they assume an authoritative and commanding demeanor, becoming less sociable and more focused on exerting control. This change highlights the influence of their habitual command over others at sea, suggesting that the role alters their personality significantly.

Stephen's reflection implies that this shift is not entirely positive, as he critiques the lack of amiability that accompanies the person's newfound authority. The implication is that the traits valued in social settings do not carry over to maritime environments, where leadership can foster a sense of rigidity and pragmatism. Thus, O'Brian underscores the complexities of human behavior and the impact of environment and occupation on one's character.