What is Spiritual Abuse?

"There are spiritual systems in which. . .the members are there to meet the needs of the leaders. . . These leaders attempt to find fulfillment through the religious performance of the very people whom they are there to serve and build. This is an inversion of the body of Christ. It is spiritual abuse." -- from the "Subtle Power of Spiritual Abuse" by David Johnson and Jeff VanVonderen, 1991