Final answer:
The narrator in Mark Twain's 'Life on the Mississippi' initially exhibits overconfidence in his steamboat piloting abilities, feeling that he can navigate any part of the Mississippi River without assistance.
Step-by-step explanation:
In Mark Twain's memoir Life on the Mississippi, the narrator, who is a younger Twain, reflects on his experience as a cub pilot—a trainee steamboat pilot—under the mentorship of Mr. Bixby. The narrator initially exhibits a sense of overconfidence in his abilities to pilot the steamboat, as evidenced by Twain's use of phrases like 'brimful of self-conceit' and carrying his nose 'as high as a giraffe's.' Twain writes in the first person, which allows readers to closely engage with his personal feelings and experiences. The narrator regards himself highly, believing that he can navigate any part of the river without assistance, which sets the stage for the anecdote and the evolving relationship between the narrator and Mr. Bixby.