Yıldızların Tabiatı ve Astroloji Sanatının Tarifi

For the Sun and Mars are inclined toward a fiery nature; Saturn and Mercury toward an earthy nature; Jupiter and the Head toward an airy nature; Venus, the Moon, and the Tail toward an aquatic nature. However, there is a certain distinction among these simple categories: for although the Sun and Mars are both hot and dry, the heat of the Sun is vital, while that of Mars is destructive. Likewise, the cold and dryness of Mercury is a favorable nature, while that of Saturn is hostile; the temperament of Jupiter is a nourishment to nature, while that of the Head, though complex, is not sufficiently friendly; Venus and the Moon are also favorable to birth, while the Tail is less suitable. These things having been established, since the science of such celestial virtues seems almost infinite, it is appropriate to determine the matter through art and to prescribe limits for the practitioner, so that from both, the end of each may be understood more easily and certainly. Astrology, therefore, is the science of the virtues of stellar motion toward a defined time and toward the consequence of that time.