In Norse mythology, Odin holds the keys to Valhalla, welcoming fallen warriors who died bravely in battle. Valhalla, symbolizing glory and honor, is an eternal resting place where souls prepare for the final battle of Ragnarök. Odin's role as the gatekeeper signifies not only his sovereignty but also the culture's value on courage and heroism. The selection of warriors reflects the belief in honor and the return of heroes, emphasizing the importance of valor in the Norse societal context and the aspiration to achieve immortal status through heroic deeds.