Hello,
There are many opinions, almost as many as there are people. This presents a great problem when trying to find the truth of anything. Whom do you listen to???
Happily true Christians are not in this quandry, we have the only source of information that is always accurrate, God's word, The Holy Bible. Shouldn't we search to see what the Bible says about spirits, or demons or any other problem we encounter???
The Bible is very clear about demons. They are fallen angels, they are now Satan's angels, Rev 12:9, Jude 6.
These are very different from what many people believe to be spirits of people who have lived on earth. In order to understand if it is possible for a spirit to live independently of the body, we must understand exactly what death is.
When God created Adam. the scriptures say that God formed him from the dust of the ground, then breathed into him the breath of life, and the man BECAME A LIVING SOUL, Gen 2:7. Notice that Adam was not given a soul, he became a soul after God breathed into him the breath of life. notice Gen 2:17, where God told Adam that if he ate of the tree of knowledge he would die, Gen 3:19 explains what would happen to Adam and Eve, they would return to the dust from where they came. There was nothing about Adam in existence before he was created. After death he would again cease to exist, Job 14:1,2.
Actually the term for soul, in Hebrew, is nephesh, which means a breather. This term nephesh, is used for all breathing animals, not just mankind.
Interesting is what is written at Ecc 3:18-20. Here we read that mankind is just like the beast, they have the same spirit, and the both return to the dust when they die. Anything other that that is VANITY.
Positive proof that no soul or spirit of a once living person can exist and be able to do or know anything is recorded at Ecc 9:5,6, 10. These scriptures tells us that a person who has died has no thought or knowledge or anything else. They have NOTHING to do with anything that is to be done.
Notice Job 14:21, which tells us about a man who has died. He knows nothing about the accomplishments of even his son.
Ps 6:5 tells us that in death there is no mention of even God. If a person is in heaven would he not be praising God continually??? A similar thought is recorded at Ps 115:17.
Ps 146:3,4 tells us that when a man dies his thoughts perish. This makes it impossible for a man to be either rewarded or punished.
Something Jesus said is telling, John 3:13. Jesus said that NO MAN had ascended to heaven. Acts 2:34 says that even David a friend of God, did not ascend to heaven. Exactly who would then go to heaven, if God's very best people did not???