Matthew 10:1

Jesus summoned His twelve disciples and gave them authority and power over unclean spirits, to cast them out, and to heal every kind of disease and every kind of sickness. 

Jesus gave His disciples authority and power over unclean spirits. When Jesus was crucified and rose again, Jesus gave us power and authority over unclean spirits to cast them out and to heal every sickness. God is waiting on us to exercise our faith and use the authority. God can’t violate His law and our free will.