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There are three different modes by which we proceed towards the most excellent end, namely, instruction, nature, and practise. There are also three persons, the oldest of the wise men who in the account given to us by Moses derive three names from these modes, whose lives I have now discussed, having examined the man who arrived at excellence in consequence of instruction, and him who was self-taught, and him who attained to the proposed end by practise. Accordingly, proceeding in regular order, I will now describe the life of the man occupied in civil affairs. And again, Moses has given us one of the patriarchs as deriving his name from this kind of life, in which he had been immersed from his earliest youth.