The modern revival of E.S.P., fortune telling, astrology, magic, the Ouija board, the spirit seance and a score of other occult practices have caused many to wonder whether human beings may be possessed or controlled by evil spirits.
Many Christian people recall the cases of demon possession recorded in the Bible in connection with our Lord’s earthly ministry.
There is indeed much evidence that there was a great outbreak of demon activity when Christ was on earth. This outbreak seems to have abated soon after the Lord’s ascension to heaven, but many are asking: Has another such epidemic broken out?
Whatever the answer to this question, the Scriptures clearly indicate that the best defense against the activity of Satan and his hosts is sincere faith in Christ, of whom we read that, “having vanquished” the powers of evil at Calvary, “He made a show of them openly, triumphing over them in it” (Col. 2:15). It is on the basis of Christ’s finished work of redemption that St. Paul joins believers in…
“Giving thanks unto the Father, who hath made us meet [fit] to be partakers of the inheritance of the saints in light: who hath delivered us from the power of darkness, and hath translated us into the kingdom of His dear Son” (Col. 1:12,13).
Not only is the true believer in Christ “delivered… from the power of darkness,” but upon believing he becomes “the temple of the Holy Spirit,” a living shrine where Christ is worshipped. Thus St. Paul says again: “What! Know ye not that your body is the temple of the Holy Spirit” (I Cor. 6:19). How then could the Christian’s body also be the dwelling place of an evil spirit? source