In "The Mark of Athena" by Rick Riordan, the theme of sacrifice emerges as a crucial element in defining true success. The characters embark on a journey that tests their strengths and relationships, revealing that achieving their goals often comes with significant personal costs. These sacrifices underscore the idea that greatness is not merely achieved through victory but is intertwined with the willingness to give up something valuable for a greater purpose.

The quote "True success requires sacrifice" resonates deeply within the narrative, illustrating that the path to fulfillment is often fraught with challenges that demand courage and selflessness. As the characters navigate their challenges, they learn that the bonds formed through sacrifice enrich their experiences and ultimately lead them closer to their shared objectives. The book emphasizes that success is a collective endeavor, shaped by the contributions and sacrifices of all involved.