https://www.mljtrust.org/sermons-online/ephesians-6-10-13/spiritism-and-the-christian/

Do not tinker with demons! In this sermon on Ephesians 6:10–13 titled “Spiritism and the Christian,” Dr. Martyn Lloyd-Jones addresses the topic of spiritualism and the use of mediums. He says that while the Bible never denies the existence of spirits and other powers, it nevertheless condemns the use of these spirits to commune with the dead and divine the future. He uses the example of Saul and the witch of Endor as an example of the pagan spiritism that God’s word unequivocally condemns. It is only out of a spirit of unbelief that people are tempted to turn away from God and try to consult the dead. This reliance on unholy demonic powers is a fundamental denial of the Father, Son, and Holy Spirit and His loving providence over the entire world. It is only when people reject God that they turn to pagan idolatry. Furthermore, some have argued that the Bible, particularly the ministry of Jesus, is compatible with spiritualism. Dr. Lloyd-Jones states that to do so is to reject the clear teachings of the gospel that it is the Holy Spirit and the power of God that empowers the ministry of Jesus, not so-called spirits and medians. Only the true power of God can preserve and lead to all truth and righteousness.