"Because you have so little faith," he answered; "for, I tell you, if your faith were only like a mustard-seed, you could say to this mountain 'Move from this place to that!' and it would be moved; and nothing would be impossible to you."
All at once a spirit will seize him, suddenly shriek out, and throw him into convulsions till he foams, and will leave him only when he is utterly exhausted.