The passage that best supports the idea that the extreme struggle of living in the wilderness changes people's views about life is:
"[T]hey perceived themselves finite and small, specks and motes, moving with weak cunning and little wisdom amidst the play and interplay of the great blind elements and forces."
This passage reflects how the harsh realities of nature lead the characters to a humbling realization of their own limitations and insignificance in the grand scheme of life, illustrating how the struggle for survival impacts their perspective on existence.