How we cite our quotes: (Part.Chapter.Paragraph)
Quote #1
His experiences on the western plain had taught Glass that the performance of his rifle could mean the difference between life and death. (1.2.46)
In many ways, Glass's rifle, the Anstadt, is a symbolic representation of his skill and prowess. While many of the men employed by the Rocky Mountain Fur Company are inexperienced and unprepared, Glass has been developing the skills he'll need on the frontier his entire life.
Quote #2
From his time with the Pawnee, Glass possessed a broad familiarity with the plants of the plains. (1.8.24)
It helps that Glass spent a year or so with the Pawnee Tribe. This experience not only allows him to better relate with his American Indian peers, but also to utilize a skillset most trappers don't have access to.
Quote #3
He remembered a trap he had once seen set by Pawnee children. [...] For Glass, the exercise was now deadly serious. (1.9.42)
Once again, we see Glass utilize skills gleaned from the Pawnee to huge effect. What was once a time-waster for kids is now a lifesaver for a desperate man—funny how things work out, huh? This also shows Glass's strong capacity for improvisational thinking.