"Peanuts" comic strip character Linus Van Pelt one said: "There are three things I have learned never to discuss with people: religion, politics and the Great Pumpkin."

Religious overtones long have intertwined with Halloween, with their implications shadowing the most anticipated and celebrated North American holiday this side of Christmas.

A $7 billion annual industry — costumes, candy, parties, decorations, haunted houses and other traditional trappings — attests to its popularity.

Some diverse attitudes toward Halloween come from certain faiths or individuals of extreme conviction.

Jehovah's Witnesses believe a holiday originating from a pagan festival should not be celebrated by true Christians, while observant Jews and Muslims both frown upon Halloween not only because of its pagan roots but its early ties to Christianity and the Catholic Church.

Some Anglicans underscore the accompanying All Saints' Day, some Lutheran and Reformed sects celebrate Oct. 31 more as Reformation Day in remembrance of the Protestant Reformation, and some conservative Christians deem Halloween as incompatible with their faith because it celebrates the occult and draws attention to evil and grotesque elements.

And some ethicists worry trick-or-treating may promote greedy or gluttonous tendencies, to say nothing of the "tricks" leading to acts of vandalism or violence.

Meanwhile, many religious individuals see no negative significance with Halloween, treating it instead as a purely secular holiday with no real threat to one's spirituality.

In other words, it's a holiday having evolved over the centuries.

Historians trace Halloween's origins back more than 2,000 years ago to the areas of modern Ireland, United Kingdom and northern France. Ancient Celtic calendars were dived into a "lighter" season of growing and a "darker" half being the oncoming winter of dreary days, uncertainty, low food and death.

With the Nov. 1 equivalent being regarded as starting a "new year," the Celts conducted the preceding evening a festival of "Samhain," believing it to coincide when the spirits of the dead were most likely to visit.

The Celts used the festival to welcome and honor ancestors while warding off or confusing harmful spirits by wearing costumes and masks. Besides using the festival as a time to predict the future, Druids — Celtic priests — built bonfires used in cleansing rituals and for sacrificing crops and animals to Celtic deities.