Accepting the claims of astrology is much like accepting the laws pertaining to property rights and slavery set up over three thousand years ago by the rulers of Babylon, and using their theories of medicine as well, for that is when the rules that are still used by modern astrologers today were devised. When this rigid set of regulations came up against the Christian faith, there arose a problem that was, as usual, neatly explained away by the practitioners. The one single horoscope that would seem of greatest interest to early Christians was that of Christ, but the astrologers, well aware of the opposition of the church to their art (the priests had their own methods to promote), feared casting such a horoscope because they would be accused of making God subject to the controlling forces of the heavens He had created! Such a paradox was not to be countenanced. But Roger Bacon, a devout astrologer and Christian, saved the situation with a masterpiece of rationalization. He declared, in a letter to the pope, that God had willed his son to be born at a time when the signs were auspicious and in harmony with the constellations. Bravo!
Flim-Flam! Psychics, ESP, Unicorns, and Other Delusions - James Randi