The secret of all the miracles and phenomena of the sages and masters is to be seen in the power that they are able to draw from within. There are faqirs and dervishes who practice jumping into the fire or cutting their body and healing it instantly. But there exists a power even greater than that. Those who can really do such things do not do them openly; but at the same time there is this power which gives proof that spirit has power over matter, though spirit may be buried under matter for some time -- which makes one powerless.