Answer:
The answer is that he’s caught up in the harpist’s song, just like Hrothgar’s people.
Step-by-step explanation:
Grendel is described to be lonely and apart from the people, who considered him a monster. From his perspective, the harpist was the one that gives the people an idea of the world being powerful and purposeful. In other words, he is the one who creates meaning in a meaningless world.