Writers in order to explain away the above difficulty quote, for example: "Maimonides (born 1131 A.D.) in his guide, Rashi (1030) and Aben Ezra (1119) in their commentaries, hold that the light of the first day was that of the sun itself, which revolving in its sphere from west to east and from east to west made a day of twenty-four hours. The scripture's saying that it was created on the fourth day is incident to its thus demonstrating its effects upon plants, which appeared on the third day; rain, which proceeded from the exhalations and vapors raised from the earth by the action of the sun's heat thereon, being necessary to their vegetation. Therefore, it is clear that there was no new creation on the fourth day; but the heat implies that on that day the sun developed the effects of his heat on plants." This is one of many explanations of philosophical commentators who have tried to explain away the difficulty of creation, owing to the many doubts that arose in the minds of learned men about the tenth and eleventh centuries A.D.; and especially the Greek philosophers, Aristotle [4] and others. Volumes upon volumes have been written in order to explain away the difficulties theologians encounter. As science advances, explanations and reconciliations become more difficult. Maimonides, in his pious enthusiasm, after having consulted Aristotle and others, is not quite certain, but he claims (according to More, xi, 15): "I propose to show that the creation of the world, as our religion teaches, is not impossible, and all philosophical reasonings to the effect that it is not so, as I have said, they may overthrow, but cannot make any objection against us. As for me, I stand firm in my belief on the question, of whether the world had a beginning or not. I accept the solution of this problem from the prophets, as the prophets explain these things, which speculation cannot reach," etc. (Kusari I, 65, 67). In other words, Maimonides, the authors of the Talmud, and all other writers, theological philosophers, Hebrew and Christian, prove the truth of the Bible by the Bible. One portion of scripture must prove another portion to be true. The Jews use their own biblical authorities to demonstrate one another's statements. Isaiah gives evidence for Moses, and Moses is made to testify for Isaiah, and so the Jewish philosophers whip the devil round the ring. The Christians have a double hold. They have a New Testament. They prove the statements made by persons figuring in the Old Testament by statements made in the New Testament. That is, they make Elijah, Elisha, Isaiah, Ezekiel, Moses, etc., give testimony for John, Mark, Matthew, and Luke; and then make Luke, Matthew, Mark, and John give evidence for Moses, Ezekiel, Isaiah, Elisha, Elijah, etc.