The phoenix's blood grants eternal life, but recipients discover that outliving everyone and everything they love turns deathlessness into an unbearable punishment rather than a prize. The desire to escape death is shown to rest on a misunderstanding of what makes a finite life meaningful.
Individual lives are presented as brief currents within a vast, continuous stream of cosmic life that reincarnates and recombines across eras. What matters is not the preservation of any single self but participation in the ongoing flow, which renders grasping ambition and conquest ultimately futile.
Reading events across widely separated eras side by side reveals humans making the same mistakes (greed for power, fear of death, exploitation of others) regardless of technological advance. Viewed this way, 'progress' is exposed as a repeating loop rather than a forward line, so ancient and futuristic settings illuminate the same unchanging human drives.