Ambrose of Milan : And inasmuch as my discourse took as a proof of its assertion that passage in the Book of Deuteronomy which speaks of the man who had two wives, one beloved and the other hated, you seem to have felt much concern lest any one should suppose this man had taken to himself two souls, which is impossible. But you yourself know that sometimes, when Scripture uses allegory, it refers some things to the figure of the Synagogue, some to that of the Church; some things to the soul, others to the mystery of the Word, others to souls of different kinds and qualities, which he who has spiritual discernment can distinguish. And so I conceive that it is not two souls, but different qualities of the same soul, which are treated of in the following chapter of the Law. For there is an amiable kind of soul, which desires pleasure, which shuns labour, shrinks from compunction, slights the judgments of God. It is amiable because it seems gentle and sweet for the time, and one that soothes rather than distresses the mind. But there is another severer kind, which is consumed with zeal for God, which, like a strict wife, will not permit or suffer her consort to commit whoredoms, allows no indulgence to the body, gives no licence to delight or pleasure, renounces the hidden deeds of shame, devotes herself to arduous labours and to severe perils. — Letters 31-40