Self-confidence, faith, trust, perseverance, and patience are all necessary. As long as you tell yourself that it is not possible for a dervish to give you a word, or that this word cannot possibly do what he says, then even though you went especially to that rock just to call out the word, you would find that the rock would not open. So then you would think, "It is no use. I will go home again", or you would think, "This is a rock: how can it possibly be opened or split?" True, it will never be opened in this case, for then the word has no power. The word is the sword, and the sword needs an arm to wield it; the arm to wield it is faith. If there is no faith there is no arm either; the sword is there but there is no one to wield it. Someone must be there to hold the sword, and it is faith that will hold it.