When the Shah of Persia wished to have the History of Persia written by some literary person, there was no one found who could do it, until the mystic poet Firdausi said that he would write it. And he wrote from his inner knowledge the Shahnamah, the history of the Shahs of Persia. If he has this knowledge from the recollection of his own previous lives, he must have reincarnated repeatedly in Persia and in Persia only, uninterruptedly, endowed each time with the same degree of intelligence, so as to acquire and retain all this knowledge.