"The term ESOTERIC ASTROLOGY is derived from the idea that behind the outer form of ordinary astrology (exoteric astrology) there is an esoteric form which proceeds from an entirely spiritual realm of being. It has long been recognised by the more thoughtful astrologers and historians of astrology that much of the philosophy underlying their science properly belongs to the ancient wisdom once taught in the Mystery Centres of Egypt and Greece, which has now become not only exoteric, but even badly mutilated in the process. It is equally apparent that the stream of esoteric knowledge is still available to those who are prepared to make the considerable effort required to reach into the spiritual realms from which it proceeds. Many astrologers have indeed made this effort, through the guidelines set out in the Neoplatonic, Rosicrucian and Qabbalistic forms of astrology, with the result that it has been possible for them to formulate some of the ancient laws of esoteric astrology".
- F.Gettings