Praying for the Impossible

When the disciples were unable to help a struggling boy, a grieved and frustrated Jesus rebuked them for their “little faith” (see Matthew 17:20). In 2017, could Jesus say the same thing to us? The irony is that in the same breath as His admonishment, Jesus said only a little faith was needed to move mountains. Was He confused? Did He contradict Himself?  Or does the wordplay point to a life-changing truth?