The whole intention of the story is to illustrate the reaction of people to a person doing something that is both eccentric and suggestive of sin/guilt - and also to produce a feeling of un-rightness and unrighteousness. With this objective in mind it would be counterproductive to the story's intention to have any sort of resolution in regards to the reason for the veil. The reason for this story is not to be found in the story itself but through an examination of Hawthorne's life. His grandfather was one of the judges that presided over the Salem witch trials (the one that didn't retract or repent). There is a theme of unrepentant evil that exists in much of Hawthorne's work: The Scarlet Letter, Young Goodman Brown, The Minister's Black Veil, House of Seven Gables, etc.
whether they publicly display it, recognize it, or do nothing about it
Parson hoopers perception of the world is that every person has a secret
He's referring to death.
there was a man named parson and he was on a curse
He suggests that everyone has their own black veil (being secret sin which he alludes to in his first sermon) whether they publicly display it, recognize it, or do nothing about it.
He was a parson. (member of the clergy)
The Parson's Handbook was created in 1899.
Parson's Pleasure ended in 1991.
Brandy for the Parson was created in 1952.
Parson Weems was born in 1759.
Parson Weems died in 1825.
Del Parson was born in 1948.