The City of God, Volume I

birth. But why not also with respect to conception, which takes place undoubtedly with one act of copulation? And, indeed, so great is the force of nature, that after a woman has once conceived, she ceases to be liable to conception. Or were they, perhaps, changed at birth, either he into a male, or she into a female, because of the difference in their horoscopes? But, whilst it is not altogether absurd to say that certain sidereal influences have some power to cause differences in bodies alone,—as, for instance, we see that the seasons of the year come round by the approaching and receding of the sun, and that certain kinds of things are increased in size or diminished by the waxings and wanings of the moon, such as sea-urchins, oysters, and the wonderful tides of the ocean,—it does not follow that the wills of men are to be made subject to the position of the stars. The astrologers, however, when they wish to bind our actions also to the constellations,

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