The Ordinary World: A place where the protagonist is from that is uneventful and provides little challenge.
The Quest Decision: Whether the protagonists accepts or refuses the challenge.
The Threshold and the Guardians: A world that the protagonist enters, guarded by things that provide a challenge to the protagonist.
Beowulf leaves "his far off home" after hearing stories of Grendel's atrocities. Beowulf is "the strongest of the Geats" and therefore takes the challenge of fighting Grendel. His ordinary world is Geatland. (Lines 109-110).
Mentors: A Character that provides assistance or advice to the protagonist.
Beowulf travels across the water to Denmark, land of the Danes. Beowulf accepts the challenge by offering to fight Grendel to pay of his father's debt to Hrothgar, King of the Danes. Beowulf "alone and with the help of [his] friends may purge all evil" from Herot, the mead hall which Grendel is terrorizing. (Lines 165-166).
The Abyss: The Last Battle in which the Protagonist faces.
Beowulf enters the Danes' home where he meets King Hrothgar. Beowulf vows to kill Grendel when he comes to devastate the mead hall. Herot's "benches rattles, fell to the floor, gold-covered boards grating as Grendel and Beowulf battled across them." (Lines 298-300).
The Transformation: Returning back to their ordinary world a changed person with different values.
Hrothgar, King of the Danes, was one of Beowulf's most predominant mentors throughout the story, aiding in two of the threshold guardian moments. He warns Beowulf of how evil these creatures are. Hrothgar says to Beowulf, "our only help, again, lies with you." (Lines 443-444).
Beowulf becomes King of the Geats. "One day, however, a fire-breathing dragon that has been guarding a treasure for hundreds of years is disturbed... the dragon begins terrorizing the Geats, and Beowulf, now an old man takes on the challenge to fight it." (Beowulf's Last Battle).
Beowulf, on the edge of death, gets help from a brave warrior named Wiglac. He instructs Wiglac to lead his people after the bravery he had shown. Beowulf went from bragging about "dripping in [his] enemies blood", but then goes through a hard battle where most of his protection fails him, causing him to be more humble. Throughout the story Beowulf has always been a man keen on kinship, the same goes to Wiglac who is the only soldier to step up and help King Beowulf in his time of need. Anglo-Saxons believed that "the thane shouldn't survive the king... the worst fate for these people was to be exiled... sense of identity came from the warrior community." (Anglo-Saxon Culture, paragraph two).