'Spirits' in the Bible

They were all amazed and began to say to one another, "What's happening here? For with authority and power he commands the unclean spirits, and they come out!"

and those who suffered from unclean spirits were cured.

At that very time Jesus cured many people of diseases, sicknesses, and evil spirits, and granted sight to many who were blind.

and also some women who had been healed of evil spirits and disabilities: Mary (called Magdalene), from whom seven demons had gone out,

Now a large herd of pigs was feeding there on the hillside, and the demonic spirits begged Jesus to let them go into them. He gave them permission.

Nevertheless, do not rejoice that the spirits submit to you, but rejoice that your names stand written in heaven."

Then it goes and brings seven other spirits more evil than itself, and they go in and live there, so the last state of that person is worse than the first."