What is Astrology?

In traditional Hellenistic astrological texts, astrology is often defined as a divine science or cosmic order that seeks to understand the relationship between the heavens (the cosmos) and human life on Earth. Hellenistic astrology, which originated in the Greco-Roman world between the 2nd century BCE and the 7th century CE, places a strong emphasis on the macrocosm-microcosm relationship—the idea that the movements of celestial bodies (the macrocosm) directly influence or reflect events in the human realm (the microcosm).

Key aspects of how astrology is defined in these texts include:

1. The Study of the Heavens' Influence on Earthly Affairs:

Astrology in Hellenistic texts is seen as a study of the influence of the stars and planets on human life. The celestial bodies are thought to exert cosmic forces that impact everything from the fate of individuals to the rise and fall of nations.

• Claudius Ptolemy, one of the most influential Hellenistic astrologers, in his work Tetrabiblos, defines astrology as the science of understanding the influences of celestial bodies on earthly phenomena. He emphasizes that astrology is based on natural laws and causality, where the planets and stars act as causes of changes in the physical and metaphysical world.

2. Astrology as a Predictive Art (Judicial Astrology):

Astrology is often viewed as a predictive science—referred to as judicial astrology—which involves forecasting future events based on the position of planets, stars, and constellations. The primary focus is on interpreting the birth chart (natal chart) to understand an individual’s fate, personality, and life events, as well as mundane astrology that predicts political or natural events.

• Vettius Valens, another prominent Hellenistic astrologer, in his work Anthology, describes astrology as the art of interpreting the configurations of the heavens to predict outcomes related to personal destiny, such as health, wealth, career, marriage, and death.

3. Astrology as a Cosmic Order (Harmony between Cosmos and Life):

The Hellenistic worldview was deeply rooted in the idea of a harmonious cosmic order, where everything in the universe is interconnected. Astrology, therefore, is seen as a system for understanding this cosmic harmony, where the positions and movements of celestial bodies follow divine laws that are reflected in earthly events.

• Manilius, in his poem Astronomica, discusses astrology as a divine system through which the cosmos reflects fate and destiny. He describes astrology as a sacred science, given by the gods to humans as a means to interpret the divine plan and cosmic patterns that govern life.

4. Fate and Free Will:

Hellenistic astrology deals with the concept of fate and determinism, but there is also an ongoing debate within the tradition about the role of free will. While the planets are seen as determining the broad outline of a person's life and destiny, many Hellenistic astrologers believed that individuals could exercise free will within the limits set by the stars.

• Firmicus Maternus, in his work Mathesis, explores how astrology reveals destiny but also emphasizes the importance of interpreting astrological signs wisely, implying that individuals may influence their own actions within the framework of their cosmic fate.

5. Astrological Techniques:

Astrology in the Hellenistic tradition is deeply structured, with several key techniques for interpretation, including:

• Zodiacal signs: The 12 signs of the zodiac represent different cosmic forces.
• Planets: The seven classical planets (Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn) each have specific influences and rulerships over different areas of life.
• Houses: The 12 houses are used to divide the natal chart into sectors of life (such as wealth, relationships, career, etc.).
• Aspects: The angles between planets are critical in determining their influences on each other.
• Lots (or Arabic Parts): Key points in the chart that signify specific life areas, especially the Lot of Fortune.

6. Astrology as a Philosophical Practice:

Hellenistic astrology is not only about prediction but also has a philosophical dimension. Astrology is intertwined with Stoicism, Neoplatonism, and other Greek philosophies that seek to understand the order of the universe. It offers a way to reflect on one's place in the cosmic order and accept one's fate, as well as understand the workings of cosmic justice.

Key Hellenistic Texts Defining Astrology:

1. Claudius Ptolemy's Tetrabiblos: Ptolemy systematized astrology and defined it as a natural science closely linked to astronomy. He emphasized that astrology works through natural causes, where planets have a causal influence on the Earth.
2. Vettius Valens' Anthology: Valens compiled a comprehensive manual of astrology that describes the practice as a way to interpret cosmic signs to determine an individual’s fate.
3. Firmicus Maternus' Mathesis: Maternus discusses astrology as both a divine science and a practical method for interpreting the planets’ influence on human affairs.
4. Manilius’ Astronomica: A poetic work that links astrology to divine wisdom and cosmic harmony, seeing the stars as signs of a higher cosmic order.

Summary:

In traditional Hellenistic astrology, astrology is defined as a divine science that interprets the movements and positions of celestial bodies to understand and predict events on Earth. It operates within a framework of cosmic harmony, linking the macrocosm (the universe) to the microcosm (human life). While emphasizing fate and determinism, astrology also leaves room for free will and personal wisdom in navigating life within the constraints of cosmic destiny.