Religious views of cremation depend on the specific religion, spirituality, or culture. Some religions, like Hinduism and Buddhism, prefer cremation and see it as a way to release the soul from the physical body and facilitate its journey to the next life or state of being. On the other hand, certain branches of Christianity and Judaism traditionally prefer burial, viewing it as a more respectful way to honor the body, though perspectives within these religions are evolving.
Cremation is not universally forbidden in Christianity, and it is becoming increasingly accepted among many denominations, including the Roman Catholic Church. A respectful Christian cremation must bury the deceased's cremated remains intact, and prohibits dividing the ashes or scattering them. Some traditional branches, like Eastern Orthodoxy and certain conservative Protestant groups, discourage cremation because they believe that the body must be intact in order for resurrection to occur.
The Bible does not explicitly forbid cremation. In the Old Testament, 1 Samuel 31:12 mentions that Saul and his sons were cremated and buried, although this cremation occurs as a response to their bodies being dismembered post-mortem by the warring Philistines. On the other hand, Amos 2:1 describes God punishing the people of Moab for sins which include burning the bones of Edom's king. Burial is depicted much more frequently in the Bible, which implies that burial is the preferred method of final disposition according to the Bible. It is important to note that views on cremation are changing within Christianity, and many denominations today permit it.
For members of Christianity, scattering ashes is considered a sin. The Church believes that while cremation is acceptable, a person's cremated remains must be kept together so that they may be successfully resurrected in the future. Non-Christian religions and agnostic & atheist households are not subject to this belief.
It is not bad luck to keep ashes in the house, and no bad luck superstitions about this exist. In fact, many families find comfort in having their loved one nearby. Apprehension or hesitation about keeping cremated remains at home is likely a cultural influence from Catholicism, which teaches that if a Catholic is cremated after death, their remains must be treated the same as an intact body and buried.
Christianity has always practiced burial, but due to the rising popularity of cremation in modern times, most Christian denominations today permit cremation even if they encourage burial as a first choice. However, Eastern Orthodox Christians still don't believe in allowing cremation, and the Eastern Orthodox Church forbids it. Historically, this ban was enacted because cremation was viewed as pagan, and denied the value of the human body and creation by God.
There is no mention of scattering ashes in the Bible, but the Catholic Church prohibits scattering because it teaches that a person's body should be interred in a sacred resting place (i.e., graveyard, which is a cemetery located on church grounds). Cremation is permitted under the basis that cremated remains are treated as if they were a whole body, and the act of scattering goes against this practice.