which line from “ the secret life of Walter Mitty” best describes Walter character

Question

“ you are not a young man any longer”

“ the old man’ll get us through,’ they said to one another”

“ they’re so damn cocky, thought Walter Mitty, walking around Main Street; they think they know everything.”

“ then, with that faint, fleeting smile playing about his lips, he faced the firing squad; erect and motionless, proud and disdainful, Walter Mitty, the undefeated, inscrutable to the last.”

Answer 1

“then, with that faint, fleeting smile playing about his lips, he faced the firing squad; erect and motionless, proud and disdainful, Walter Mitty, the undefeated, inscrutable to the last.”