To settle our judgment upon this subject, we ought to recollect, that languages and precepts may be transmitted from generation to generation by oral instruction, which indeed was once the only possible mode during a long period of time. It was then that memory was so much stronger, as, destitute of all artificial assistance, it depended solely upon itself. We bought the advantage of writing by resigning somewhat of memorial energy; this was the evil, which, according to Plato, Thamus, the Egyptian king, predicted to Theut, the inventor of writing. However this may be, it will appear founded upon reason and history, that religious creeds, which had once been the property of nations, are not easily eradicated by any force, or forgotten under any circumstances; they become living streams of ideas and sentiments, which run uninterruptedly through the ever-renewed races of man, even when these separate from a parent stock. Hence we find, in countries and among nations the most remote from each other, so many notions and customs, the origin of which is lost in the night of time. Shall I mention the Jews, who, throughout the whole world, repeat to-day the same words which they learned more than thirty-three centuries ago? With regard to the Guebres――sir W. Jones might have safely granted a little more confidence to his friend Bahman, his Persian reader, who always named with reverence Zartusht, whose religion he professed, in common with many so called Guebres. For these it was not necessary “to preserve Zoroastrian books, in sheets of lead or copper, at the bottom of wells near Yezd:”[120] this fact, which Bahman used to assert, shows the particular care which had once been taken to guard these sacred documents, the veneration for which most naturally prevented any falsification of their known contents. We are confirmed, by the author of the Dabistán, that Zoroaster did not change the fundamentals of the ancient religion; only the dualism of the principles, good and bad, not existing, as I have remarked[121] in the Mahabadian religion, was either then first introduced, or only further developed; besides, we see the cycle of 12,000 years fixed, and divided into four periods of 3000 years each; we hear the promise of a Saviour to restore the empire of God promulgated, and the destruction of the world by fire announced: this is at the same time the epoch of the general resurrection, which is one of the most remarkable dogmas of the Zoroastrian religion.