In "The Mark of Athena" by Rick Riordan, a significant theme is conveyed through the quote, "Swords can't solve every problem." This highlights the idea that while weapons can be powerful, they are not always the answer to conflicts and challenges. The characters in the story confront various dilemmas that require more than just brute force, underscoring the importance of wisdom, teamwork, and understanding in overcoming obstacles.

This message serves as a reminder that in life, as in the narrative, we often encounter situations where conflict resolution and personal growth demand thoughtful approaches rather than aggressive actions. The journey of the characters emphasizes the value of intellect, compassion, and strategy in addressing issues that arise, reinforcing the notion that true strength lies in one's ability to navigate challenges with finesse rather than violence.