The myth of Osiris highlights themes of resurrection through his story of death and rebirth. After being murdered by his brother Set, Osiris is resurrected by his wife, Isis, symbolizing the cycle of life. This narrative reinforces the belief in the afterlife and the importance of maintaining harmony in the universe. Osiris's resurrection is celebrated during the annual flooding of the Nile, which was crucial for agricultural fertility, thus connecting his myth to the natural cycle of regeneration.