Satan offered Jesus control of the world, as a reward for worshiping him.
(Luke 4:5, 6) So he brought him up and showed him all the kingdoms of the inhabited earth in an instant of time. Then the Devil said to him: “I will give you all this authority and their glory, because it has been handed over to me, and I give it to whomever I wish.
1. Humans who have been given control of the earth, communicate (spiritism*) with its true ruler. (John 12:31)
2. Such communications delude them to believe that they are in communion with a supreme being.
*In a stricter sense, spiritism is a doctrine founded upon the existence, manifestations and teachings of the spirits. https://www.definitions.net/definition/spiritism