He believes he can call her back through his song. Rather than as a merely selfish plea for the return of a loved one, the bird's song begins to appeal to the boy as a work of art whose larger theme is the quest for spiritual unity. 160-183 Convinced of the power of song, the aspiring poet turns to the sea in search of a message for his poems. The boy inverses himself in the sea to symbolize his unqualified acceptance of this larger understanding of death. And he concludes by vowing to fuse his song with the song of the bird and to communicate the joyous truth about death in his poetry.
Death is a phase in the cycle of rebirth.
The sea is also a symbol of death.