"Beowulf" is Anglo-Saxon epic poem that tells story about Beowulf and his adventures.
In this passage, we see Beowulf preparing for fight with Grendel, a monster terrorizing king Hrothgar's kingdom. Grendel is the first of three enemies Beowulf encounters on his mission.
Here, we see that Beowulf accepts his faith if he is loses in a fight. He is aware of the consequences; je is ready to fight, but he is in peace with whatever outcome may be. What needs to happen will happen and he's prepared for that.