'Spirits' in the Bible

Amazement came on all, and they spoke together, one with another, saying, "What is this word? For with authority and power he commands the unclean spirits, and they come out!"

as well as those who were troubled by unclean spirits, and they were being healed.

In that hour he cured many of diseases and plagues and evil spirits; and to many who were blind he gave sight.

and certain women who had been healed of evil spirits and infirmities: Mary who was called Magdalene, from whom seven demons had gone out;

Nevertheless, don't rejoice in this, that the spirits are subject to you, but rejoice that your names are written in heaven."

Then he goes, and takes seven other spirits more evil than himself, and they enter in and dwell there. The last state of that man becomes worse than the first."