Excerpt from Chapter 5 of Astrology and the Authentic Self by Demetra George
Now that you have delineated the Ascendant and its ruler, you have a sense of what core drive motivates the soul to action, what planet and house guide the person to his or her destination as the purpose of the life incarnation, and to what extent this will be a successful journey. Next, we will investigate just what this purpose is and how it can be expressed in the daily life. For these answers, we turn to the Sun and the Moon.
Hellenistic astrologers called the Sun and the Moon “the rulers of one’s all,” and described them as having authority over the whole life.1 Of the seven visible planets known to the ancients, the Sun is the largest body and the Moon is the smallest. Yet, by some exquisite piece of geometry and proportion, at the moment when the Full Moon rises in the east, just as the Sun sets in the west, they appear to be the same size from the perspective of Earth. Together, the Sun and Moon regulate the cycle of day and night, wake and sleep, activity and rest—a tempo that moves us through the days and months and years of our lives.
What distinguishes the Sun from the other planetary bodies in the horoscope is that it is a star. The nature and composition of a star, an enormous generator of fiery energy, is different from that of a planet. In fact, since the ultimate energy source for most of the biological processes on Earth is sunlight, the ancients were not mistaken in their worship of the Sun as the fount of life. Plato thought the stars were a more divine order of celestial entities than the planets, because they moved with a regularity quite different from the erratic movements of the planets. Today we know that the Sun is the center of our solar system; all the other planets revolve around it. As such, it can be said to be the center or heart of our being, around which all other astrological factors constellate.