Greek Philosophical Concepts

Things that are morally indifferent—neither inherently good nor bad. In Stoic philosophy, this includes wealth, health, reputation, and even death; only virtue and vice carry true moral weight.

Weakness of will—acting against your own better judgment. For Aristotle, akrasia occurs when you know what is good but fail to do it, overcome by passion, appetite, or momentary impulse.

Truth as unconcealment. Not merely accurate statements, but the fundamental orientation toward reality as it actually is, the state of being unhidden.

Courage. The willingness to face what's difficult rather than retreat to what's comfortable, acting despite fear rather than in its absence.

Freedom from destructive passions and emotional turbulence—not the absence of all feeling, but the mastery over irrational impulses that cloud judgment. The Stoics considered this the state of inner tranquility achieved when reason governs the soul rather than being enslaved by reactive emotions.

The first principle, origin, or ruling source from which all else flows. In Greek philosophy, arche represents both the fundamental beginning of something and the authority or sovereignty that governs its ongoing nature.

A ruler, commander, or one who holds sovereign authority. In Greek political philosophy, the archon embodies legitimate leadership through demonstrated excellence and wisdom rather than mere positional power.

Disciplined training and practice aimed at self-mastery, originally athletic exercise but extended by Stoics to mean rigorous spiritual conditioning. The deliberate cultivation of virtue through repeated effort and voluntary hardship.

A state of serene calmness and freedom from mental disturbance, anxiety, or emotional turmoil. Central to Epicurean and Stoic philosophy, ataraxia represents the tranquil mind that remains unshaken by external circumstances or internal passions.

Self-sufficiency. The capacity to stand on your own capability, meeting challenges through developed competence rather than chronic dependency on external support.

Self-legislation and the capacity to govern oneself according to one's own rational principles rather than external compulsion. In ancient Greek thought, it referred both to political self-governance of city-states and the individual's mastery over their own will and actions.

Sequential, quantitative time measured by clocks and calendars. Unlike kairos (the opportune moment), chronos represents arbitrary, mechanical time that passes regardless of meaning or readiness.

Opinion, reputation, or common belief as distinguished from true knowledge (episteme). In ancient Greek thought, doxa represents the realm of appearance and popular perception—what most people believe to be true, which may or may not align with deeper reality.

The inherent capacity or potential power within a thing to become what it is meant to be. In Aristotle's metaphysics, dynamis represents the latent possibility that precedes actualization (energeia)—the acorn's power to become an oak, the student's potential to become a master.

True freedom understood not as license to do whatever one wishes, but as the capacity for self-governance and liberation from internal tyranny. For the Stoics, authentic freedom meant mastery over one's judgments, desires, and reactions—the only domain truly within human control.

The state of being at work, actuality, or the full realization of potential. In Aristotle's metaphysics, energeia is the complement to dynamis—where dynamis is the power to become, energeia is the becoming itself made actual. The oak tree is the energeia of the acorn's dynamis.

The mastery of self through the power of will over impulse and appetite. For Aristotle and the Stoics, enkrateia represents the disciplined control where reason governs desire, distinct from sophrosyne in that the struggle against temptation remains consciously felt.

Scientific or systematic knowledge—understanding that grasps not merely that something is true, but why it must be so. For Aristotle, episteme represents demonstrable knowledge of causes and principles, distinguished from mere opinion (doxa) or practical skill (techne).

The characteristic function, task, or work that defines what something is meant to do. In Aristotle's philosophy, every being has an ergon—and human flourishing depends on performing our distinctive function (rational activity) with excellence.

A stable disposition or settled state of character acquired through repeated action. For Aristotle, hexis represents the intermediate condition between mere capacity and active expression—the ingrained habit that shapes how you reliably respond to situations.

The opportune or decisive moment, the critical point in time when conditions align for effective action. Unlike chronos (sequential time), kairos represents qualitative time: the right moment that demands recognition and response.

The virtue of patient endurance and steadfast perseverance in the face of hardship, pain, or prolonged difficulty. Distinguished from mere courage (andreia), karteria emphasizes the capacity to bear what must be borne without yielding or complaint.

Movement or change in its most fundamental sense—the transition from potentiality to actuality. In Aristotle's philosophy, kinesis encompasses all forms of becoming: growth, alteration, locomotion, and transformation from what something could be into what it is.

Deep fellowship and communal participation. The shared life of a community bound by common purpose, mutual responsibility, and genuine investment in each other's good. The Greeks understood that virtue develops in relationship, not isolation.

The capacity for discernment and judgment, derived from 'krinein' (to separate, decide). In ancient Greek thought, kritikos denotes the faculty of distinguishing truth from falsehood, the essential from the trivial, enabling sound evaluation and decision-making.

The act of imitation or representation, central to Aristotle's theory of art and learning. Beyond mere copying, mimesis describes how humans learn virtue by observing and emulating exemplary models, internalizing excellence through deliberate imitation until it becomes authentic character.

The comprehensive formation of a human being through education, culture, and character training. For the Greeks, paideia meant cultivating the whole person—mind, body, and spirit—to become a fully realized member of society capable of excellence.

The courage to speak truth freely and frankly, especially to those in power, regardless of personal risk. In ancient philosophy, parrhesia was considered both a moral duty and a democratic virtue—the speaker accepts danger in service of truth.

Deep friendship rooted in mutual recognition of virtue and commitment to each other's flourishing. For Aristotle, philia was essential to eudaimonia, not optional, representing the highest form of human connection beyond mere utility or pleasure.

The love of honor and distinction—an ambitious drive to earn recognition through noble deeds and virtuous conduct. In ancient Greek culture, philotimia was the competitive desire to benefit one's community while achieving personal glory, distinguishing worthy ambition from mere vanity.

Practical wisdom. The capacity to discern the right action in specific situations, particularly knowing what not to do.

The quality of trustworthiness, faith, or reliable commitment that binds relationships and communities. In Aristotle's rhetoric, pistis refers to the means of persuasion—the credibility and trust one earns through character, logic, and emotional authenticity.

The insatiable desire to have more than one's fair share—a grasping acquisitiveness that Aristotle identified as the opposite of justice. This vice drives one to claim excessive honors, wealth, or power at the expense of others and one's own character.

The act of bringing something into being that did not exist before—creative production that transforms raw material into meaningful form. For Aristotle, poiesis represents making or crafting, distinguished from mere action (praxis) by its focus on producing an external work or artifact.

The city-state as the essential context for human flourishing. For Aristotle, humans are political animals by nature, and the polis provides the community structure within which virtue can be developed and practiced.

Anticipation or preconception—the mental act of rehearsing future scenarios before they occur. The Stoics practiced prolepsis as preparation for challenges, building the capacity to hold future possibilities as present realities.

Attention to oneself; the continuous vigilant awareness of one's thoughts, judgments, and impulses that the Stoics considered foundational to philosophical practice. Prosoche is the watchful presence of mind that catches impressions before they become automatic reactions.

Self-mastery and moderation. The discipline to regulate yourself internally when nothing external compels you to continue.

The systematic knowledge and skill required to produce something well—craft, art, or applied expertise. For Aristotle, techne bridges theoretical knowledge and practical action, representing the reasoned capacity to make or create according to true understanding.