Confidence or Arrogance?

I'm not sure if Beowulf is meant to be portrayed as confident or arrogant; perhaps the poet meant to portray both characteristics.  I remember an English class I took during graduate school where we discussed vices and virtues.  Many times, unfortunately more often than not, what we see as virtues--if given unchecked latitude--can become vices.  I've seen it all too often where confidence is misinterpreted for arrogance...and vice versa--but they are not the same.  Let's examine the definitions of both words (according to Dictionary.com) and see what we find:

Confidence: (N) 

1. full trust; belief in the powers, trustworthiness, or reliability of a person or thing:

2. belief in oneself and one's powers or abilities; self-confidence; self-reliance; assurance:

3. certitude; assurance:

Synonyms: 

1. Faith, reliance, dependence.

2. Confidence, assurance--both imply a faith in oneself.

3. Confidence  may imply trust in oneself or arrogant self-conceit.

4. Assurance  implies even more sureness of oneself; this may be shown as undisturbed calm or as offensive boastfulness.

Arrogance:  (N)

1.  Offensive display of superiority or self-importance; overbearing pride.

Synonyms:  haughtiness, insolence, disdain.

Hmmm...lots to absorb and examine here.  It seems to me that one can be confident and lack arrogance.  I would venture to say that an overly arrogant person likely lacks confidence since one of the hallmarks of confidence is self-assurance and trust in one's self. So, is Beowulf overly confident to the point of arrogance or simply confident through and through? 

Let's take up where we left off:  Beowulf, the " mighty warrior, powerful and wise" is accepted by the Danish watchman and shown to King Herot, likely due to his confidence and assurance that he is able to defeat Grendel and bring peace to the court once again.  Beowulf explains this to the watchman:

"Perhaps Hrothgar can hunt, here in my heart for some way to drive this devil (Grendel) out--If anything will ever end the evils afflicting your wise and famous lord.  Here (Beowulf's confidence) he can cool his burning sorrow.  Or else he may see his suffering go on forever, for as long as Herot towers high on your hills."

Those are confident words...but is it foreshadowing an inevitable defeat?  Will Beowulf be able to slay Grendel and save Herot?  Beowulf and his compatriots certainly look like they can defeat anything.  There is a great description of the armor worn by he and his men: 

"They arrived with their mail shirts glittering, silver-shining links clanking an iron song as then came...gold-carved shields, silvery shirts and helmets..."

Beowulf debriefs King Hrothgar on his accomplishments:  "(my men) have watched me rise from the darkness of war, dripping with my enemies' blood.  I drove five great giants into chains and swam in the blackness of night hunting monsters out of the ocean." Beowulf assures that the king that he, along with his men, will "purge all evil from this hall."  Even more confidently he decides that he will fight Grendel with no weapons except his bare hands.  Talk about confidence bordering on arrogance...Beowulf wraps up his soliloquy boldly declaring that, "God must decide who will be given to death's cold grip...and fate will unwind as it must!"