Final answer:
The adult narrator in 'A Cub Pilot' reflects back on the past events with wise humor, a characteristic that shows his ability to laugh at himself and appreciate the lessons learned during his younger years.
Step-by-step explanation:
The adult narrator in A Cub Pilot by Mark Twain looks back at the events with wise humor. This reflects a retrospective viewpoint acknowledging the follies and growing pains of youth with a humorous understanding. Mark Twain is renowned for his ability to wield humor to impart wisdom, and in this text, he uses the mistakes of his youth to teach an important lesson: the necessity to rely on one's knowledge and training rather than being ruled by fear. The narrative voice is characterized by a sense of humor about the challenges the younger pilot faced and the recognition of what those experiences taught him. The revealing of his 'continuing humiliation' demonstrates his ability to laugh at himself, indicating wisdom that comes with age and experience.