LOGOS
PHILOSOPHICAL
συνέπεια (ἡ)

ΣΥΝΕΠΕΙΑ

LEXARITHMOS 751

Synépeia, a cornerstone of ancient Greek thought, denotes consistency, logical consequence, and adherence to principle. Its lexarithmos (751) reflects the complexity of the concept, linking order with action and completion.

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Definition

According to the Liddell-Scott-Jones Lexicon, synépeia (from syn- + hépomai) initially means “to follow along with, to agree, to go together.” The concept rapidly evolved to describe internal coherence and logical sequence.

In classical philosophy, synépeia constitutes a fundamental virtue and a logical principle. Plato, for instance, frequently refers to it as the harmony of the parts of a whole or the internal consistency of the soul. Consistency in action and speech is considered essential for achieving virtue and eudaimonia.

The Stoics further developed the concept, making “living in agreement with nature” (ὁμολογίαν τῇ φύσει ζῆν) the highest ideal, where consistency with the universal reason (Logos) is key to the ethical life. Synépeia is not merely the absence of contradiction but the active adherence to a rational and ethical order, both in the individual's inner world and in their external actions.

Etymology

synépeia ← synépomai ← syn- + hépomai (root hep-, meaning “to follow”)
The word synépeia derives from the verb synépomai, which is composed of the preposition syn- (together, jointly) and the verb hépomai (to follow, come after). The original meaning of the root hep- (from Proto-Indo-European *sekʷ-) denotes the action of “following” or “ensuing.”

The compound with syn- imparts the sense of simultaneous or agreed-upon following, of coherence. From this compound arise other cognate words such as the adjective synepés (one who follows, consistent) and the verb synépomai (to follow together, agree). The broader family of the root hep- includes words like épos (word, speech, sequence of thought) and épō (to be busy about, handle), underscoring the idea of sequence and continuity in various contexts.

Main Meanings

  1. Agreement, harmony — The state of agreement or internal coherence between parts or ideas. E.g., «ἡ τῶν λόγων συνέπεια» (the consistency of arguments).
  2. Logical consequence, coherence — The logical connection or sequence of ideas and arguments, where one follows the other consistently. A fundamental concept in philosophy and rhetoric.
  3. Steadfastness of character, adherence to principles — The moral quality of an individual who acts consistently with their principles, without contradictions. A virtue highly valued in ancient ethics.
  4. Result, outcome — The natural or logical consequence of an action or state. E.g., «αἱ συνέπειαι τῶν πράξεων» (the consequences of actions).
  5. Obligation, duty — Adherence to an agreement or promise, the keeping of commitments. Consistency as the fulfillment of one's word or duty.
  6. Consistency (as a quality) — The quality of being consistent, i.e., reliable, stable, and predictable in one's behavior or thought.

Word Family

hep- (root of hépomai, meaning “to follow”)

The root hep- (from Proto-Indo-European *sekʷ-) carries the primary meaning of “to follow” or “to ensue.” From this basic idea of movement and sequence, a family of words develops that describes coexistence, agreement, logical sequence, but also simple physical or temporal succession. The addition of prepositions like syn- or epi- enriches the meaning, creating concepts such as consistency, pursuit, or guidance.

ἕπομαι verb · lex. 206
The basic verb of the root, meaning “to follow, come after, accompany.” Widely used from Homer onwards to describe physical or temporal sequence. E.g., «τῷ ἕπεται δόξα» (glory follows him).
συνέπομαι verb · lex. 856
“To follow together, agree, concur.” The direct source of synépeia, it denotes a common path or intellectual agreement. In Plato, it often means “to agree with, to follow a line of reasoning.”
συνεπής adjective · lex. 943
“One who follows, consistent, logical, in agreement.” Describes the quality of being steadfast in one's principles or having logical coherence in one's discourse. E.g., «συνεπὴς λόγος» (a consistent argument).
ἔπος τό · noun · lex. 355
“Word, speech, discourse.” Although seemingly distant, it connects to the sequence of words and thoughts that compose speech. In Homer, it often refers to epic verses or speeches.
ἔπω verb · lex. 885
“To be busy about, handle, care for.” Implies the sequence of a task or adherence to a duty. In Herodotus, it is used for being occupied with a matter.
ἐφέπω verb · lex. 1390
“To follow after, pursue, chase.” The preposition epi- reinforces the idea of following with the aim of achieving or seizing. Often in a military or hunting context.
προέπω verb · lex. 1135
“To go before, lead.” The preposition pro- reverses the direction of following, implying guidance or pioneering, but retains the idea of a course.

Philosophical Journey

Synépeia, as a concept, traverses Greek thought from the classical period, evolving from a descriptive word into a central philosophical term.

5th-4th C. BCE
Classical Greek Philosophy
The word is used by Plato and Aristotle to describe internal harmony, logical coherence, and moral steadfastness. It is essential for understanding justice and virtue.
3rd-1st C. BCE
Hellenistic Period (Stoicism)
The Stoics elevate consistency to a central principle of their ethical philosophy. “Living according to nature” (ζῆν κατὰ φύσιν) is essentially consistency with the universal reason (Logos).
1st C. BCE - 2nd C. CE
Roman Period
Authors such as Plutarch and Epictetus continue to use consistency as a key virtue, emphasizing its practical application in daily life and the management of passions.
3rd-6th C. CE
Late Antiquity & Early Byzantine Period
The concept retains its importance in philosophical and theological texts, often in relation to the consistency of doctrines and the moral conduct of believers.
Modern Era
Modern Greek Usage
Synépeia remains a fundamental term, both in everyday language (e.g., consistency in obligations) and in academic contexts (e.g., logical consistency, policy coherence).

In Ancient Texts

Three characteristic passages highlight the variety of uses of synépeia in ancient literature:

«καὶ γὰρ τοῦτο δικαιοσύνη ἐστὶν, τὸ τὰ αὑτοῦ πράττειν καὶ μὴ πολυπραγμονεῖν, ὡς ἐν ἀρχῇ ἐτίθεμεν, καὶ ἡ συνέπεια τούτου.»
For this too is justice, to do one's own business and not to be a busybody, as we laid down at the beginning, and the consistency of this.
Plato, Republic 433b
«ἔστιν ἄρα ἡ ἀρετὴ ἕξις προαιρετική, ἐν μεσότητι οὖσα πρὸς ἡμᾶς, ὡρισμένῃ λόγῳ καὶ ᾧ ἂν ὁ φρόνιμος ὁρίσειεν. μεσότης δὲ δύο κακιῶν, τῆς μὲν καθ' ὑπερβολὴν τῆς δὲ κατ' ἔλλειψιν· καὶ ἔτι τὸ μὲν πάθος τὸ δὲ πρᾶξις, ἐν οἷς ἡ συνέπεια.»
Virtue, then, is a state of character concerned with choice, lying in a mean, i.e. the mean relative to us, this being determined by a rational principle, and by that principle by which the man of practical wisdom would determine it. Now it is a mean between two vices, that which depends on excess and that which depends on defect; and again it is a mean because the vices respectively fall short of or exceed what is right in both passions and actions, while virtue finds and chooses the mean.
Aristotle, Nicomachean Ethics 1106b
«καὶ οὐδὲν ἄλλο ἢ τὸ μὴ ἐπιτρέψαι τοῖς ἀδικοῦσι, καὶ τὴν συνέπειαν τῶν πραγμάτων μὴ ἀπολιπεῖν.»
And nothing else but not to permit the wrongdoers, and not to abandon the consistency of affairs.
Thucydides, History of the Peloponnesian War 1.141.1

Lexarithmic Analysis

The lexarithmos of the word ΣΥΝΕΠΕΙΑ is 751, from the sum of its letter values:

Σ = 200
Sigma
Υ = 400
Upsilon
Ν = 50
Nu
Ε = 5
Epsilon
Π = 80
Pi
Ε = 5
Epsilon
Ι = 10
Iota
Α = 1
Alpha
= 751
Total
200 + 400 + 50 + 5 + 80 + 5 + 10 + 1 = 751

751 is a prime number — indivisible, a quality the Pythagoreans considered the mark of pure essence.

The 18 Methods

Applying the 18 traditional lexarithmic methods to the word ΣΥΝΕΠΕΙΑ:

MethodResultMeaning
Isopsephy751Prime number
Decade Numerology47+5+1 = 13 → 1+3 = 4 — The Tetrad, the number of stability, order, and completion, reflecting the need for consistency in structure and thought.
Letter Count88 letters — The Octad, the number of balance, harmony, and regeneration, signifying perfect consistency.
Cumulative1/50/700Units 1 · Tens 50 · Hundreds 700
Odd/EvenOddMasculine force
Left/Right HandRightDivine (≥100)
QuotientComparative method
NotarikonS-Y-N-E-P-E-I-ASteadfast Yielding to Natural Ethical Principles, Enduring In Accord — an interpretive approach highlighting adherence to order and truth.
Grammatical Groups4V · 0H · 4C4 vowels (Y, E, E, I, A) and 4 consonants (S, N, P) — a balanced structure that underscores the harmony and coherence of the word.
PalindromesNo
OnomancyComparative
Sphere of DemocritusDivination with lunar day
Zodiacal IsopsephyVenus ♀ / Scorpio ♏751 mod 7 = 2 · 751 mod 12 = 7

Isopsephic Words (751)

Words from the Liddell-Scott-Jones lexicon with the same lexarithmos (751), but different roots, offer an interesting glimpse into the coincidences of numerology:

ἀντίνοος
the adjective “of contrary mind or disposition.” The isopsephy with synépeia creates an interesting contrast between agreement and disagreement.
ἱπποβάτης
the “horseman, one who rides a horse.” The connection can be made with the consistency of movement or the harmony between rider and horse.
παντέλειος
the adjective “complete, perfect, accomplished.” Consistency is often associated with the idea of perfection and complete harmony.
πεντήρης
the “fifty-oared galley,” a type of ship. The isopsephy may suggest the consistency of structure and organization required for such a vessel.
συνδιάκειμαι
the verb “to agree with, concur, be in the same disposition.” The semantic proximity to synépeia is evident, as both imply agreement and coherence.
χρῖμα
the “ointment, anointing.” The isopsephy may refer to the consistency of application or the homogeneity of the substance.

The LSJ lexicon contains a total of 92 words with lexarithmos 751. For the full catalog and AI semantic filtering, see the interactive tool.

Sources & Bibliography

  • Liddell, H. G., Scott, R., Jones, H. S.A Greek-English Lexicon, 9th ed. with revised supplement. Oxford: Clarendon Press, 1996.
  • PlatoRepublic, Book IV, 433b. Oxford Classical Texts.
  • AristotleNicomachean Ethics, Book II, 1106b. Oxford Classical Texts.
  • ThucydidesHistory of the Peloponnesian War, Book I, 141.1. Oxford Classical Texts.
  • Long, A. A., Sedley, D. N.The Hellenistic Philosophers, Vol. 1: Translations of the Principal Sources with Philosophical Commentary. Cambridge University Press, 1987.
  • Chantraine, P.Dictionnaire étymologique de la langue grecque: histoire des mots. Paris: Klincksieck, 1968-1980.
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