Exactly. Jung was heavily demonized, so much so that his inner eyes had opened and he perceived dark shapes crowding round him when he was at home.
Anyone who thinks to receive great knowledge from Jung and his evil spirit guides deceives themselves and will in time open the door to evil spirits who will bind their minds as was Jung's mind bound.
Unless God specifically gives one a vision of something, seeing things, especially entities, ghosts, dead people’s spirits, etc, can be counted on to be demonic.