Themes of beowulf

In the end each clan on the outlying coasts
beyond the whale-road had to yield to him
and began to pay tribute. That was one good king. (Lines 9-11)

So times were pleasant for the people there
until finally one, a fiend out of hell,
began to work his evil in the world. (Lines 99-101)

"I had a fixed purpose when I put to sea.
As I sat in the boat with my band of men,
I meant to perform to the uttermost
what your people wanted or perish in the attempt,
in the fiend's clutches. And I shall fulfill that purpose,
prove myself with a proud deed
or meet my death here in the mead-hall." (Lines 632-638)

Venturing closer,
his talon was raised to attack Beowulf
where he lay on the bed; he was bearing in
with open claw when the alert hero's
comeback and armlock forestalled him utterly.
The captain of evil discovered himself
in a handgrip harder than anything
he had ever encountered in any man
on the face of the earth. (Lines 744-752)