After an unparalleled event on the mountain top where Jesus has just revealed His glory to His three closest disciples, they return to the other 9 disciples. Upon reuniting with them, they find that the 9 had been unable to exorcise a demon from a young man. Christ diagnoses the problem as a concoction of weakness of faith and independence upon Him. He wisely uses the situation to highlight the necessity to fully rely on God in Christ for all things, including our very own faith.