they were bound together by a sidereal connection. If, therefore, the time of conception has so much to do with the similarity of destinies, these same destinies ought not to be changed by the circumstances of birth; or, if the destinies of twins be said to be changed because they are born at different times, why should we not rather understand that they had been already changed in order that they might be born at different times? Does not, then, the will of men living in the world change the destinies of birth, when the order of birth can change the destinies they had at conception?
- Concerning twins of different sexes.
But even in the very conception of twins, which certainly occurs at the same moment in the case of both, it often happens that the one is conceived a male, and the other a female. I know two of different sexes who are twins. Both of them are alive, and in the flower of their age; and though they resemble each other in body, as far as difference of sex will permit, still they are very different in the whole scope and purpose of their lives (consideration being had of those differences which necessarily exist between the lives of males and females),—the one holding the office of a count, and being almost constantly away from home with the army in foreign service, the other never leaving her country's soil, or her native district. Still more,—and this is more incredible, if the destinies of the stars are to be believed in, though it is not wonderful if we consider the wills of men, and the free gifts of God,—he is married; she is a sacred virgin: he has begotten a numerous offspring; she has never even married. But is not the virtue of the horoscope very great? I think I have said enough to show the absurdity of that. But, say those astrologers, whatever be the virtue of the horoscope in other respects, it is certainly of significance with respect to 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,