Final answer:
Lewis references his age to lend credibility to his arguments, and fear creates an imaginary prison by limiting our actions and choices.
Step-by-step explanation:
Lewis references his age in order to emphasize his experiences and perspective. By mentioning his age, Lewis is highlighting the fact that he has lived a longer life and has accumulated wisdom and knowledge over the years. This lends credibility to his arguments and makes his ideas more compelling and authoritative. Fear creates an imaginary prison by limiting our actions and choices. It holds us back from pursuing our goals and exploring new opportunities. For example, if someone has a fear of public speaking, it may prevent them from speaking up in class or participating in presentations, thus limiting their academic and personal growth.