The disciples and the church have not turned the world upside down by their own savvy; the billions of changed lives these past 2000 years are not a psychological phenomenon. There is a real, effective power in the Gospel of Jesus Christ. From 12 disciples to billions of believers. That power is dunamis. The disciples and the church have not turned the world upside down by their own savvy; the billions of changed lives these past 2000 years are not a psychological phenomenon. There is a real, effective power in the Gospel of Jesus Christ. From 12 disciples to billions of believers. That power is dunamis.