LOTR: Why Are Stars So Important In Middle Earth?

It is well known that light, particularly that of the stars, is incredibly significant in the Lord of the Rings, because it is able to provide hope when things seem futile, to provide clarity when judgment is clouded, and to offer salvation to those who choose to turn towards it and bask in its glow. This is especially apparent in the light of Elendil, the most beloved star of the elves of Lothlorien, which is given to Frodo as a gift from Galadriel. This starlight rescues him on several occasions, it enables him to survive the battle against Shelob the spider demon and helps Sam break through the Silent Watchers to rescue his friend from the tower.