Well, I'm going to take a chance that we're looking at the same text. (Next time perhaps include which version of the text you're using or maybe include some other information which would ensure you get exactly what you're looking for.)
These pages in my book are those in which Beowulf arrives and introduces himself to Hrothgar. Beowulf is nothing if he's not bold, so he boldly introduces both himself and his mission to the King. Not surprisingly, Beowulf recieves an enthusistic greeting and we hear that his reputation as a good man and a fine warrior have already reached the Danes. So far, so good.
Then Beowulf asks for what he calls one simple thing:
"That I, alone and with the help of my men,
May purge all evil from this hall. I have heard,
Too, that the monster's scorn of men
Is so great that he needs no weapons and fears none.
Nor will I....My hands
Alone shall fight for me, struggle for life
Against the monster."
This is where Beowulf really starts to sound arrogant. Most of the people in the hall are willing to overlook that in their desire to be rid of Grendel. There is one, though, who is not impressed with the boastful Beowulf. Unferth, in a drunken, angry speech, asks this:
"You're Beowulf, are you--the same
Boastful fool who fought a swimming
Match with Brecca, both of you daring
And young and proud, exploring the deepest
Seas, risking your lives for no reason
But the danger?"
Beowulf's answer is truthful, I'm sure, but he also sounds boastful and arrogant as he recounts what really happened in this incident with Brecca and as he puts Unferth in his place, calling him a coward and a murderer of his own brother.
So, the impression we have of Beowulf as he arrives at the hall and explains himself to Hrothgar is one of a man who is awfully sure of himself, boastful, and probably a little crazy to want to take on this monster with nothing but his bare hands. If we're the people in the hall, though, we don't care; in fact, we hope he's right so we can go back to living our peaceful lives.
I think that not only is Beowuld boastful an much more but he is very arrogant an thinks that he can do things to get other people appreciation an make everything right between him an the other people that look down on him not in a good way but in a bad way just like the drunk man in the poem.