IN THIS LESSON
As the Persians advance into Greek territories, the Milesian worldview travels to new shores.
Topics discussed:
The Persian Invasions of Greece
Xenophanes' theological views
Xenophanes' distinction between knowledge and belief
Epistemic self-awareness
Heraclitus' relativism and his doctrine of flux
Heraclitus' views on improving the soul
For lesson transcripts, go to zencastr.com/The-Luxury-of-Virtue.

Focus Questions
Xenophanes continued the trend of moving away from the traditional Homeric conception of the gods that defined Greek religion. How did Xenophanes’ view of a monotheistic, supreme god differ from the traditional conception of the gods?
As epistemic inquiry continues to develop throughout the Greek city-states, so too does the criterion for what actually constitutes knowledge. In what way did Xenophanes’ belief in knowledge being divine contrast with the prevailing views about knowledge?
Xenophanes emphasized the importance of epistemic self-awareness and reflecting on one’s beliefs to know if they have proper justification. What are examples of how he applied this type of thinking to the average citizens and philosophical contemporaries of his day?
What is Xenophanes’ naturalistic explanation of religious beliefs?
Contrast the notions of epistemic humility and epistemic arrogance. Provide an example of someone is epistemically humble and someone who is epistemically arrogant either from pop culture or from your own life.
Heraclitus’ conception of knowledge depends upon his ideas of flux and his particular brand of relativism. Discuss Heraclitus’ relativistic views. In what way can one, for example, both step and not step into the same river twice?
What is Heraclitus’ doctrine of flux? (Note: I provided a Buddhist-adjacent interpretation of this idea from Heraclitus.)
Heraclitus stressed the importance of effort in recognizing the interconnected and ever-changing nature of the world and our conception of it. What role did interrelatedness and flux play in his understanding of the relationship between body and soul?
According to Heraclitus, what things can we do to improve the state of the soul?

Glossary
Historical & Political Context
Ionian Revolt (499–494 BCE) – A rebellion of Greek city-states in Ionia (modern Turkey) against Persian rule. Its failure led to Persian invasions of mainland Greece.
Greco-Persian Wars (ca. 500–479 BCE) – A series of conflicts between the Persian Empire and Greek city-states, including the famous battles of Marathon (490 BCE), Thermopylae (480 BCE), and Salamis (480 BCE).
Thebes & Medizing – Thebes was one of the Greek city-states that sided with Persia during the wars, a decision viewed as treasonous by later Greeks. To “medize” was to collaborate with the Persians.
Xenophanes' Exile (546 BCE) – Xenophanes was likely forced to leave his home city of Colophon when it was conquered by Persia, shaping his critical perspective on conventional beliefs.
Persian Rule Over Ionia – The Milesian philosophers, including Xenophanes and Heraclitus, lived under Persian control, which may have influenced their views on power, tradition, and skepticism.
Xenophanes & His Critique of Knowledge
Epistemic Humility – The recognition that human knowledge is inherently limited. Xenophanes argues that only the divine possesses true knowledge, while humans can only achieve beliefs of varying reliability.
Belief vs. Knowledge –
Knowledge (Episteme) – A divine state of certainty, inaccessible to mortals.
Belief (Doxa) – The best humans can achieve, but always fallible and incomplete.
Critique of Anthropomorphism – The idea that humans project their own traits onto the gods. Xenophanes mocks this by noting that Ethiopians imagine black gods, Thracians imagine pale, red-haired gods, and if horses had gods, they would resemble horses.
Monotheism or Monolatry? – Traditional interpretations see Xenophanes as the first monotheist in Greece, but newer scholarship suggests he may have advocated monolatry (the worship of a single god while acknowledging others).
Against Superstition – Xenophanes denounced belief in omens, divine intervention, and myths about gods interacting with humans, arguing instead for naturalistic explanations.
Critique of Hero Worship – He questioned why athletes were celebrated more than philosophers, arguing that intellectual achievements benefit society more than physical strength.
Satirical Philosophy – Unlike other early thinkers, Xenophanes used poetry, satire, and polemics to challenge dogmatic beliefs and epistemic arrogance.
Heraclitus & The Philosophy of Change
Logos (λόγος) –
For Heraclitus, logos does not yet mean “divine reason” as later Stoics would use it.
Instead, it refers to the principle or account of reality—a hidden order that governs all things.
The universe is always communicating wisdom, but most people fail to listen.
The Doctrine of Flux (Panta Rhei, πάντα ῥεῖ) –
“Everything flows.” The fundamental nature of reality is change.
This is often illustrated by his famous river fragment:
“You cannot step into the same river twice.”
OR: “Into the same rivers we step and do not step, we are and are not.”
This means that change and stability are relative: the river remains “the same” in name, but the water is always different.
Unity of Opposites – The idea that seeming contradictions are actually interdependent:
Day and night exist together.
Harmony arises from discord.
Good and evil define each other.
Heraclitus & Fire –
Aristotle reported that Heraclitus believed fire was the arkhé (the fundamental element of reality).
A more radical view suggests he rejected the idea of a single arkhé altogether, seeing reality as constant transformation rather than a fixed substance.
Soul & Dryness –
Heraclitus was the first Greek philosopher to connect the soul to cognition and ethics.
He claimed that a dry soul is the best soul—associating wisdom with clarity and self-discipline, while moisture (pleasure, indulgence, intoxication) corrupts the soul.
Asceticism – Heraclitus criticized drunkenness and indulgence, believing that pleasure weakens the soul’s ability to perceive truth.
Seeing the World as It Is –
Most people live as if asleep, unaware of the deeper order of things.
The philosopher's task is to "wake up" and perceive the hidden structure of reality.
Philosophical Implications & Connections
Being vs. becoming –
The Milesian philosophers struggled with the relationship between stability and change.
Heraclitus rejects Being (permanence) and embraces becoming (constant transformation).
Parmenides (his rival) does the opposite, rejecting change as an illusion; there is only Being.
Relativism? –
Some interpret Heraclitus as a relativist (truth depends on perspective).
Others argue that he believes in an objective order (logos), but it is difficult to grasp.
Comparison to Buddhism –
The idea of flux and interdependence resembles the Buddhist concept of emptiness (śūnyatā).
Just as Heraclitus saw all things as interwoven, Buddhists reject the idea of fixed, independent essences.
Comparison to Stoicism –
Later Stoics, especially Marcus Aurelius, were deeply influenced by Heraclitus’ emphasis on impermanence and the logos.
The idea that one should align oneself with nature’s order echoes Heraclitus' call to wake up and see reality as it is.
Words You Might Not Know
Medizing – The act of collaborating with Persia, seen as treasonous by the Greeks.
Monolatry – The belief in a single supreme god while acknowledging the existence of others.
Anthropomorphism – The tendency to attribute human traits to gods, animals, or non-human entities.
Epistemic Arrogance – The overconfidence in one’s own knowledge, a key target of Xenophanes’ critiques.
Parrhesia (παρρησία) – The practice of speaking boldly and honestly, even when it offends others—exemplified by Xenophanes.
Polemics – A strong verbal or written attack on someone or something, often used in philosophical disputes.
Asceticism – The practice of self-discipline and renouncing pleasure to achieve wisdom or spiritual insight.
Unity of Opposites – The idea that seemingly contradictory things depend on one another (e.g., life and death, war and peace).
Logos (λόγος) – In Heraclitus’ usage, the hidden principle governing the universe, later developed into a key Stoic concept.
Doxa (δόξα) – Mere belief or opinion, which Xenophanes contrasts with true knowledge.
Psyche (ψυχή) – Often translated as “soul,” but originally meant “life force” rather than a distinct, immortal essence.
For other questions…

Reading List
David Conan Wolfdorf, Early Greek Ethics.
Robin Waterfield, The First Philosophers: The Presocratics and the Sophists.
Roderick Beaton, The Greeks: A Global History.