How does a spirit become a demon?

Answer 1

It hard to explain most of the time though you would live a life of total wickedness like always doing horrible things killing animals and tormenting them and doing the same to humans having no love care or passion for any one but your self and doing things you know you shouldn't.

another response:

Humans cannot become demons. In the religious traditions that include demons in their worldviews, demons are a separate category of spiritual beings.

Answer 2

It is the general concensus for most religions that to truly become "demonic", one has to be possessed by, or over taken by, an evil spirit. And, some believe that the spirit has to be removed by excorcism.

Answer 3

People do not become demons. There are many plot lines in books, movies and on television that involve the "assention" of people to demons or some other transformation, however these are all works of fiction. There are some biblical reports of people being possessed by a demon, but even that is not the same thing as becoming one.

Answer 4

demons are fallen angels, so the demons were made from the moment that 1/3 of the angels in heaven joined Lucifer in an attempt to overthrow god.