You Have Such Little Faith

There was a story in matthew 17 where the disciples were sent out with authority to be able to heal sick and cast out demons. They thought they was doing itan. They going around touching people, and people are getting healed. And then this father brings his son, and his son literally says, my son is demon possessed. Can you pray for him? The disciples like, we done this before, lest get this baby healed. And they walk up and they lay hands on him, and nothing happens. He said, you have such little faith. Now i want you to see, ove a mustard seed here. This is all the faith you need to get everything that god's pur