Is there a Spirit world? Can the dead speak from the grave? Who are the angels? Can psychics and fortunetellers predict the future with 100% accuracy?
The only means which God has to deliver people from the slavery of sin is the blood of Jesus. They must recognize that the only way of deliverance from evil is through the blood of the great Lamb, who should sacrifice His life for them and for the world. They should learn their deliverance from spiritual Egypt was fully as great, if not greater, than their deliverance from the physical slavery of the literal Egypt.