When David and Regan York heard music in their living room in the middle of the night, they discovered an instrument playing on its own, the result of craftsmen in Southeast Asia having invited spirits into instruments they made. The couple had intended to use traditional instruments to connect with the local culture and create opportunities to share their faith, but they hadn’t expected spirits to inhabit their means of ministry. Once they prayed over the instrument, it stopped playing, proving God’s power in the spirit world.