Answer:
it can be
waking up early, doing some like exercise/yoga, respecting elders, or may be having self confidence..
I would say the first option. "river knows. I from man conceal". To me says nature knows but he's hiding it from people.
Wiglaf is presented as Beowulf's savior and helper. He is there to mentor Beowulf and is an important character in this excerpt.
A fighter for economic justice because the sentence is listing the different things that he was