Answer:
In Beowulf, an old epic poem, the fight between the Grendel and the Beowulf supports the evidence that it is a symbol of the struggle between the evil and the good due to feud with the almighty God. The symbolism of Beowulf’s gesture in lines 356-359
“wulfgar] then turned quickly to where hrothgar sat
old and hoary with his band of retainers
walked stoutly so that he by shoulders stood
with the lord of the danes ”
which reveal a theme resulting from this conflict is when Grendel's arms are hung from the rafter by Beowulf. Through this, it depicts that heaven and goodness have prevailed. Hence, through the nature of actions by Beowulf, the theme of violence is highlighted and that of evil versus goodness.