Final answer:
The factor that most influences the speaker's perspective is age.
Step-by-step explanation:
The factor that most influences the speaker's perspective in the excerpt is age. The speaker mentions that 'praise had bled my lines white of any more anger, and snow had inducted me into white fellowships.' This suggests a sense of maturity and the passage of time, indicating that the speaker's perspective has been shaped by their life experiences and age.
Learn more about Influences on a speaker's perspective in literature