In "Master and Commander" by Patrick O'Brian, the author explores the emotional consequences of repressed anger. When individuals do not express their feelings of anger in a timely manner, those feelings can transform into a deep sense of melancholy. This transformation suggests that unaddressed emotions can be harmful, leading to an internal struggle that affects one's overall well-being.

The narrative highlights the importance of acknowledging and expressing emotions instead of letting them fester. By illustrating the shift from anger to melancholy, O'Brian emphasizes that it's crucial for individuals to confront their feelings head-on rather than allowing them to simmer beneath the surface, which can result in emotional pain and dissatisfaction.