Consideration of the body and soul as two aspects of a single essence. In their relationship, the two are understood as matter and form. The soul as the actuality of the individual.

Aristotle, son of the physician Nicomachus, was born in Stagira in 384 BC. There is little information about the early years of his life. At the age of seventeen, he went to Athens to study at the Platonic Academy. He stayed there for twenty years, from 367 to 348 BC, when Plato died.

When Aristotle left for Assos in Troad, after a three-year stay there, he went to Lesbos and then to Macedonia, where he took on the upbringing of the royal child Alexander. When his student ascended the throne, Aristotle settled in Athens and founded his school, the Lyceum.

After Alexander's death (323 BC), the philosopher's stay in Athens became difficult. He was forced to flee to Chalcis, his mother's homeland, where he died in 322. A universal spirit, Aristotle created a vast and valuable philosophical and scientific work.

Epistemology, logic, theology, physics, biology, psychology, ethics, political philosophy, and aesthetics are the main fields of knowledge he researched and studied. The Alexandrian Hermippus estimated Aristotle's works at 400. Lists have survived that include 143 titles of his works. Diogenes Laertius estimated the number of verses in Aristotle's writings at 440,000.

The influence of his work on shaping global thought was strong for centuries and remains so.