heroism

Heroism is a legendary and supernatural quality. The term was first applied to tales concerned with knights, chivalry, and courtly love. Several romances deal with Alexander the Great, King Arthur and the knights of the Round Table, and Emperor Charlemagne. The Arthurian romances fall into three broad groups. Some, such as Sir Gawain and the Green Knight, are tales that involve the testing of a young knight. Others, such as the Tristan und Isolt of …

…re a couple examples of Launcelot a knight of the round table swaring to risk his life for Camelot and Lady Guenevere. This is from Launcelot to Arthur "All of what you desire will be done for I am a true knight". Another promise but this one is to Lady Guenevere "Fair damsel I shall not fail you by the grace of god". Someone who can make apromise like this definetly proves you're a hero.