The Rabbi and his talmidim were travelling about and noticed a very large crowd. When they came to the crowd, a man came up to the Rabbi, fell on his knees before him and said, "Master, have mercy on my son, for he is a lunatic and is very ill. He often falls into the fire and often into the water. I brought him to your talmidim but they could not heal him."
And the Rabbi answered and said, "You crooked generation that lacks faith! How long shall I be with you? How long shall I put up with you? Bring him here to me." And the Rabbi rebuked him, and the demon came out of him, and the boy was cured at once.
Then the talmidim came to the Rabbi privately and said, "Why could we not drive it out?" And he said to them, "Because your faith was small; for amen I say to you, if you have faith like a mustard seed, you will say to this mountain, 'Move from here to there,' and it will move; and nothing will be impossible to you."
-- This is the life of The Rabbi. --