Which line from the secret life of Walter Mitty best develops Walter character

One line from "The Secret Life of Walter Mitty" that best develops Walter Mitty's character is: "He was so stirred up that he was ready to start for the hospital at once, and the next time he glanced at his watch, he discovered that his normal day had resumed."

This line showcases Walter Mitty's tendency to daydream and escape from reality in order to cope with his mundane and unsatisfying life. It reveals his desire for excitement and adventure, as he imagines himself in daring and heroic situations. Additionally, the line shows his dissatisfaction with his ordinary life, as he eagerly embraces the idea of going to the hospital, possibly as an escape from his mundane reality.