Final answer:
Mr. Hooper didn't take off his veil on his deathbed because it symbolized hidden sin and guilt.
Step-by-step explanation:
In the story mentioned, there are multiple instances where characters do not take off their veils in certain situations. In each case, the reasons behind this action can vary. When Mr. Hooper was on his deathbed, he did not take off his veil because it represented a larger symbolic meaning.
The black veil that Mr. Hooper wore was a visual representation of secret sin and guilt, and he chose to keep it on as a way of reminding people of their own hidden flaws and the need for repentance.