Then the disciples approached Jesus in private and said, “Why could we not drive it out?” He said to them, “Because of your little faith.” Matthew 17:19-20
Back in Chapter 10 of the book of Matthew, Jesus commissioned the twelve apostles. After giving them the authority to drive out unclean spirits and cure every disease and illness, He sent them forth to do His Father’s work.
Day in and day out, for seven chapters, they apparently did well. That is, until they come to the boy with the demon in this chapter. Suddenly, they can’t seem to carry out their mission and expel the demon. Not understanding why, they approach Jesus for the answer.