Again he says: 'Do not weave flax into a woollen garment, or wool into a linen garment' (cf. Deut. 22: 11); and: 'Do not cultivate two kinds of fruit together on the same patch of your land' (cf. Deut. 22:9). Similarly, you are not to mate an animal of one species with an animal of another species, but to mate like with like. All this is a concealed way of saying that you must not cultivate virtue and vice together in yourself, but you must devote yourself singlemindedly to producing the fruits of virtue; and you must not share your soul with two spirits - the Spirit of God and the spirit of
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