Aristotle: Life, Thought, and Influence
Aristotle’s Life and Works
Aristotle lived in the 4th century BC and was a student of Plato for 20 years at the Academy in Athens. Born in Stagira, Macedonia, he was considered a metic (resident foreigner) in Athens. After Plato’s death, Aristotle returned to Macedonia and began writing on logic, physics, politics, and metaphysics. Later, he returned to Athens and founded the Lyceum, also known as the Peripatetic School.
Aristotle initially enjoyed the patronage of Alexander the Great, but later criticized Alexander’s imperialistic ambitions. This, coupled with his metic status, placed him in a precarious position. He eventually sought refuge on an island to avoid persecution.
The works of Aristotle that survive are primarily lecture notes used at the Lyceum. His major works are categorized into logical treatises, writings on physics and natural history, metaphysics, treatises on ethics and politics, and finally, rhetoric and poetics.
Aristotle’s Classification of Knowledge
According to Aristotle, all knowledge can be grouped into three main categories:
- Theoretical Sciences: Anthropology, logic, physics, mathematics, astronomy.
- Practical Sciences: Ethics, politics, and economics.
- Poietic Sciences: Related to the arts (poetry, rhetoric) and technical subjects (engineering, medicine).
Aristotelian Thought
Ontology and Metaphysics
While initially influenced by Plato, Aristotle departed from the Theory of Ideas and developed a rationalist-empirical method. He believed the essence of reality is immanent to things, not separate from them. He argued that reality presents itself in various ways, with substance (‘ousia’) being the primary way of being. Substance is the essence of a thing, what makes it what it is.
Aristotle also introduced the concepts of accidents (changes a substance undergoes), potentiality (ability to become), and actuality (what a being is at present). He distinguished between matter (potentiality and accident) and form (actuality and substance). He believed that beings are composed of matter and form (hilemorphism).
Aristotle distinguished between primary substances (individual, existing things) and secondary substances (genera or species).
Aristotelian Physics
Influenced by his upbringing in a medical family, Aristotle’s understanding of reality emphasized observation and the study of natural life. He explained the existence of natural beings by seeking their causes. He identified four causes:
- Material Cause: The matter of which a thing is made.
- Formal Cause: The form or shape that makes a thing what it is.
- Efficient Cause: The agent that brings a thing into being.
- Final Cause: The purpose or goal for which a thing exists.
Aristotle’s thought is teleological, emphasizing the final cause. He also studied movement and change in natural beings, including the passage from potentiality to actuality. He posited the concept of the Prime Mover, an eternal, unmoved principle that sets the universe in motion.
Epistemology
Aristotle believed in an empirical-rational approach to knowledge. He argued that there are two sources of knowledge: sensory experience and the intellect. Sensory experience provides data about individual beings, which the intellect processes through induction and deduction. He made significant contributions to logic, including the study of syllogisms.
Anthropology
Aristotle viewed humans as a composite of soul and body, a single substance. The soul is the form of the body, the principle of life. He identified three functions of the soul: vegetative (survival), sensitive (shared with animals), and intellectual (unique to humans). He placed humans at the top of the biological scale due to their capacity for reason (logos).
Ethics
Aristotle’s ethics is often described as eudaimonistic, focused on achieving happiness (eudaimonia) through virtue. He believed that happiness is achieved by fulfilling one’s potential, particularly through the development of the intellect. He identified two types of virtues: ethical virtues (habits acquired through practice) and intellectual virtues (related to understanding and intelligence).
Ethical virtues are achieved through moderation, finding the mean between two extremes. Intellectual virtues lead to the contemplation of truth and the highest form of happiness. Aristotle also recognized the importance of the common good and the connection between ethics and politics.