Bible Questions and Answers

A visitor writes,

"Are there any scriptures that says we all have a demon assigned to us?"

Demons are defined in scripture as unclean spirits.
Luke 8:26  Then they sailed to the country of the Gadarenes, which is opposite Galilee. 27  And when He stepped out on the land, there met Him a certain man from the city who had demons for a long time. And he wore no clothes, nor did he live in a house but in the tombs. 28  When he saw Jesus, he cried out, fell down before Him, and with a loud voice said, "What have I to do with You, Jesus, Son of the Most High God? I beg You, do not torment me!" 29  For He had commanded the unclean spirit to come out of the man.
Spirit is the way we think.
Numbers 14:24  "But My servant Caleb, because he has a different spirit in him and has followed Me fully, I will bring into the land where he went, and his descendants shall inherit it.
Luke 9:55  But He turned and rebuked them, and said, "You do not know what manner of spirit you are of.
An unclean spirit is a deranged mind – what we understand today to be mental illness.
When Jesus had cured the man, he is said to be ‘in his right mind’
Luke 8:35  Then they went out to see what had happened, and came to Jesus, and found the man from whom the demons had departed, sitting at the feet of Jesus, clothed and in his right mind. And they were afraid.
There are no such entities as demons, it’s just a way of describing mental illness.  
I hope this helps.
God bless,
Glenn