The word harbingers as it is used in this excerpt is a person or thing that announces or signals the approach of another.
The preparations that Beowulf and his men make prior to their encounter with Grendel, Apex
Building a fire is an act of technical skill and technology, and fire in literature has also often been used as a symbol of knowledge. The building of a fire thus symbolizes life in the story, but also life through human knowledge, skill, and technology.
Answer: reexamine is the answer.
If you need some adjectives:
astonishing
mesmerising
astounding
