Matthew 17:17-20

17 Jesus said, "What a generation! No sense of God! No focus to your lives! How many times do I have to go over these things? How much longer do I have to put up with this? Bring the boy here."

18 He ordered the afflicting demon out - and it was out, gone. From that moment on the boy was well.

19 When the disciples had Jesus off to themselves, they asked, "Why couldn't we throw it out?"

20 "Because you're not yet taking God seriously," said Jesus. "The simple truth is that if you had a mere kernel of faith, a poppy seed, say, you would tell this mountain, 'Move!' and it would move. There is nothing you wouldn't be able to tackle."