In a response of two to three sentences, explain how the following lines contribute to beowulf's characterization as a hero.
"the comer–from–far–land had cleansed then of evil,
wise and valiant, the war–hall of hrothgar,
saved it from violence. he joyed in the night–work,
in repute for prowess; the prince of the geatmen
for the east–danish people his boast had accomplished"