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The second argument is drawn from Scripture says: "Have you not known? Have you not heard, that the everlasting God" (Isaiah 40:28). It says "known" which implies knowledge from rational proofs, and afterwards "heard" which implies from the Tradition. And likewise, "Have you not known? Have you not heard? Has it not been told you from the beginning?" (Isaiah 40:21). The prophet preceded mentioning knowledge from rational proof to knowledge which is from received tradition. And likewise Moses, our teacher, said: "Do you thus requite the L-ord, Oh foolish and unwise people? Is He not your Father who acquired you? Has He not made you and established you? Remember the days of old; consider the years of many generations. Ask your father, and he will show you; your elders, and they will tell you." (Deut. 32:6). This is a proof to what we mentioned, that despite that the Tradition should be preceded by nature, for the students must learn it first, nevertheless, it is not right to rely solely on it for one who is able to comprehend it by the method of rational demonstration. It is therefore proper, that everyone who is capable of this, is under duty to investigate with his intellect and to bring logical proofs of it by the demonstration which deliberate judgment would support.