He accepts the challenge, knowing that most likely, it will be his last battle.
He is a prisoner of circumstances who does not fight for a better life.
He does not give up his sea voyage despite the fact that it does not bring him any pleasure: Bosque taketh blossom, cometh beauty of berries, Fields to fairness, land fares brisker, All this admonisheth man eager of mood, The heart turns to travel so that he then thinks On flood-ways to be far departing. Secondly, Beowulf and the seafarer have different prominent traits of character.
Beowulf defines himself through courage and strength, and he shows these features on the battlefields.
For instance, “In he came then, the thane’s commander, the arch-warrior, to address Hrothgar: his courage was proven, his glory was secure.