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Proclus

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Proclus Lycius was a major Greek Neoplatonist philosopher of late antiquity. He is remembered as one of the last great classical philosophers. Proclus built one of the most complex and complete systems of Neoplatonism. This was a school of thought based on the ideas of Plato. His work was so influential that it shaped many different cultures. It reached Byzantine philosophy and early Islamic philosophy. It also impacted scholastic philosophy and German idealism. The philosopher G. W. F. Hegel even called his work a vital transition. He believed Proclus marked the shift from ancient philosophy to Christianity.

Proclus was born in 412 AD in Constantinople. His family held high social status and came from Lycia. He was raised in Xanthus and began his studies in Alexandria. There, he studied mathematics, philosophy, and rhetoric. He originally intended to become a lawyer like his father. He actually practiced law for a time in Constantinople. However, he soon realized that his true passion was philosophy. He returned to Alexandria to study Aristotle under Olympiodorus the Elder. He also studied mathematics with a teacher named Heron. In 431, he moved to Athens to join the famous Academy. He eventually became the head of the Academy in 437.

Neoplatonism is a philosophical system that seeks to explain the structure of reality. Proclus and other Neoplatonists focused on three main levels called hypostases. These levels are The One (hen), The Intellect (nous), and The Soul (psyche). Proclus also added a unique layer to this system. He introduced individual units called henads. These henads exist between The One and the rest of being. They sit at the head of chains of causation called seirai. These chains give different parts of the universe their specific character. Proclus identified these henads with the Greek gods. For example, one henad might be Apollo. Another might be Helios, the sun.

Proclus believed philosophy had a very practical purpose for the soul. He thought philosophy could liberate the soul from bodily passions. It could remind the soul of its origin in the higher levels. This preparation helped the soul ascend during life. It also helped the soul avoid falling into a new body after death. Because the soul is often distracted by the physical world, Proclus suggested using reminders. He supported the practice of theurgy. Theurgy uses special words, acts, and objects to connect with the divine. Proclus believed the power of the henads extends into the material world. This allows the soul to be drawn back up toward its origin.

Proclus was an incredibly prolific writer. His biographer, Marinus, reported that he wrote seven hundred lines every day. Most of his books were commentaries on the dialogues of Plato. He believed Plato's writings were divinely inspired. He argued that the structure of Plato's texts imitated the universe itself. One of his major systematic works is the Elements of Theology. This book contains 211 propositions and proofs. It starts with the existence of The One and ends with the descent of souls. He also wrote the Platonic Theology. This work organizes material from Plato to show the divine orders.

In addition to theology, Proclus wrote extensively about mathematics. He wrote a commentary on the first book of Euclid's Elements. This work is a very important source for the history of ancient mathematics. In it, he listed several generations of famous mathematicians. These included people like Archytas of Taras and Eudoxus of Cnidus. He also wrote a commentary on the Timaeus. In this work, he explained how the Soul acts as a mediator. It connects the Forms in the Intellect to the material world. He used mathematical proportions to explain how the Soul constructs the body.

The legacy of Proclus is vast and reaches through many centuries. His ideas influenced Medieval philosophy through the writings of Pseudo-Dionysius. This author used Proclus's metaphysical principles in Christian works. Another major influence was the philosopher Boethius. Boethius included Proclus's principles in his work, Consolation of Philosophy. One book, the Liber de Causis, was even mistaken for a work by Aristotle. It was studied widely in the Arabic world before its true origin was known. During the Renaissance, thinkers like Marsilio Ficino studied his ideas. Even today, his name remains in science. There is a crater on the Moon named after him.

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