Beowulf plays host to many essential Anglo-Saxon ideas; they mostly manifest in Beowulf himself. Beowulf is committed to bravery, faith, loyalty, and generosity, several key Anglo-Saxon values. He is, of course, a fierce warrior and loyal to his faith. He travels to Hrothgar's land of the Danes to face the horrific Grendel and help the people escape his wrath. Not only is he generous for offering his assistance, he is loyal to Hrothgar because of an alliance his uncle made with the king. Friendship and family were also central Anglo-Saxon values, and they manifest in Beowulf's fierce devotion to that alliance.
Also, even though his defeat of Grendel earns him fame and appreciation, Beowulf remains loyal to his own king, Hygelac, and his home, Geatland. Anglo-Saxons also valued honor. To warriors like Beowulf, honor was everything. They demonstrated their honor by serving their king and in their noble treatment of one another.
Certainly, in many cultures, warriors have been expected to uphold a code of honor, bravery, loyalty, and a plethora of other Anglo-Saxon values. For example, the virtues of a Samurai include courage, morality, compassion, sincerity, respect, and character. Roman gladiators were expected to demonstrate the virtues of courage and total discipline in their battles. Though these cultures existed at different times and in different places, there are many common threads that connect them.