Plato’s Theory of Forms and the Hierarchy of Being: Second Lecture on Western Philosophy for Indian Students

Plato’s Theory of Forms and the Hierarchy of Being (including rare terms: methexis, chora, noesis/noeta, anamnesis, etc.)

Second Lecture

By Tanmoy Bhattacharyya

The single most consequential metaphysical revolution in Western thought occurred when a young Athenian aristocrat, imprisoned by the spectacle of Socrates’ judicial murder, decided that the sensible world is not the real world. That man was Plato (427–347 BCE), and the doctrine he forged (the χωρισμός or separation of true being from becoming) remains the great watershed between archaic naturalism and all subsequent ontology.

This Lecture is not an introduction to Plato; it is an advanced, technical descent into the full armature of Platonic metaphysics as it actually exists in the dialogues: the autokath’auto Forms, methexis and parousia, the chōra, noēsis and the two-tiered noetic realm, anamnesis, the mathematica, the psychogonic hierarchy, and the late henadological turn in the unwritten doctrines. Every rare and difficult term in the English Platonic lexicon will be deployed accurately and without apology: epekeina tēs ousias, hypostasis, proodos, monē, epistrophē, autohypostatic ideas, henads, noetic triad, noeric triad, dianoetic metaxu, chiasmic inversion, synaition, etc.

1. The Ontological Difference: Being vs Becoming

In the exact center of the Republic (Book V, 477–480), Plato draws the sharpest distinction in the history of metaphysics:

• τὸ ὄν (to on) – that which fully is, unchanging, knowable only by noēsis
• τὸ γιγνόμενον (to gignomenon) – that which becomes, never truly is, subject to genesis and phthora
• τὸ μὴ ὄν (to mē on) – absolute non-being (impossible)
• τὸ μεταξύ (to metaxu) – the intermediate realm of mathematical objects and sensible images

The Forms are αὐτὸ καθ’ αὐτό (auto kath’ auto) – self-predicated, identical with their own essence. The Form of Beauty is not beautiful by participation in something else; it is Beauty-itself, the per se paradigm. The Form of Equality is not equal; it is the ontologically prior reality that makes equal sticks “equal” only homonymously.

This is not mere conceptualism. The Form is an αἴτιον τοῦ εἶναι (aition tou einai) – a cause of being, not merely of being-thought. When a sensible particular “participates” (μετέχειν) in a Form, it does not borrow a property; it is suspended from a transcendent hypostasis whose energeia radiates immanence.

2. The Modes of Relation between Sensible and Intelligible

Plato uses three technical terms whose differences are almost never observed in English scholarship:

• μέθεξις (methexis) – participation (the sensible receives the Form)
• παρούσια (parousia) – presence (the Form is present-to the sensible)
• κοινωνία (koinōnia) – communion (mutual relation, especially between Forms)

Later Neoplatonists will add μίμησις (mimēsis – imitation) and ἀφ’ ἑνός (aph’ henos – derivation from the One), but in Plato these three already mark distinct causal directions.

3. The Receptacle (χώρα) and the Ontology of Becoming

Phaedo and Republic still speak as if sensibles are pale copies. The Timaeus (48e–52d) radically complicates the picture by introducing the third kind (triton 50c): τὸ τρίτον γένος, the χώρα – neither Form nor sensible, but the eternal wet-nurse of all becoming.

The chōra is:

• ἀμόρφου πανδεχές (amorphou pandeches) – formless all-receiver
• ἀόρατον εἶδός τι (aoraton eidos ti) – an invisible kind of form
• δυσθήρατον – difficult to hunt down
• κινούμενον ἐν ἀλόγῳ τινὶ τόπῳ – moving in an irrational place

It is described with deliberately paradoxical language: it “is” only as the locus of perpetual othering; it partakes of the intelligible in a most obscure way (πάντων ἀμυδρότατα, 51a). The chōra is not space in the Newtonian sense, nor matter in the Aristotelian. It is pre-ontological, the meonic matrix that allows images (εἴδωλα) of the Forms to flicker into appearance. Without the chōra, methexis would be impossible; with it, becoming is ontologically grounded in a non-being that is not absolute mē on.

4. The Divided Line and the Hierarchy of Cognition

Republic VI–VII (509d–511e and 532a–b) presents the famous analogy of the Divided Line, which is not a ladder of progress but an ontological proportion:

A (highest) – νοητόν: noēsis of the ἀρχαί (Forms known by pure intellection) B – νοητόν: διάνοια (dianoetic reasoning using hypotheses, i.e., mathematics) C – δόξαστον: πίστις (belief in sensible particulars) D (lowest) – εἰκασία (imaging, shadows, reflections)

The ratios are crucial: A:B :: B:C :: C:D, meaning the ontological gap between noēsis and dianoia is as great as between dianoia and pistis. Most readers miss this; mathematics, for Plato, is not the highest knowledge but a metaxu, a propaedeutic that turns the soul from becoming to being by forcing it to use invisible hypotheses.

5. The Noetic Realm: The Sophist and the Five Greatest Kinds

The late dialogue Sophist (254b–259d) performs an autopsy on the realm of Pure Being and discovers it is not simple. There are five μέγιστα γένη (megista genē) whose interweaving constitutes the noetic fabric:

1. ὄν (Being)
2. ταὐτόν (Sameness)
3. θάτερον (Otherness)
4. στάσις (Rest)
5. κίνησις (Motion)

Rest and Motion are mutually exclusive yet both participate in Being. Otherness permeates all Forms, allowing each to be not-the-others. This is the first appearance of a genuinely dialectical ontology: being is community (κοινωνία τῶν εἰδῶν), not isolated monads.

6. The Sun, the Good, and the Epekeina

Republic 508a–509b contains the most enigmatic passage in all philosophy:

“The Good is not οὐσία but ἔτι ἐπέκεινα τῆς οὐσίας, πρεσβείᾳ καὶ δυνάμει ὑπερέχον” (The Good is not being/essence, but still beyond being, surpassing it in seniority and power.)

The phrase epekeina tēs ousias detonated two millennia of speculation. In the oral tradition reported by Aristotle and the Neoplatonists, Plato identified the Good with the One (τὸ ἕν) and the Form of Beauty with the Intelligible Living-Being (τὸ ζῷον αὐτοκαθ’ αὐτό). The One is not a Form but the ἀρχὴ ἀναπόθετος (unhypothesized principle) from which the indefinite dyad (ἄπειρον δυάς) proceeds as the principle of multiplicity.

7. Anamnesis and the Psychogonic Cycle

Meno, Phaedo, and Phaedrus establish that learning is ἀνάμνησις – recollection. The soul is immortal, pre-exists embodiment, and has beheld the Forms in a disembodied state. Embodiment is a fall (σῶμα = σῆμα, body = tomb). The wings of the soul (Phaedrus 246–249) atrophy through attachment to sensible pleasure but regrow through philosophical eros.

The psychogonic hierarchy in Phaedrus is strict:

1. Gods (always winged)
2. Philosophers, beauty-lovers, musical/erotic souls
3. Kings, statesmen
4. Doctors, trainers
5. Prophets, mystery priests
6. Poets, imitators
7. Craftsmen, farmers
8. Sophists, demagogues
9. Tyrants (lowest)

8. The Unwritten Doctrines: Henads, the One, and the Indefinite Dyad

Aristotle’s testimony (Metaphysics A 6, Physics Γ 4, etc.) and the indirect tradition (Sextus, Simplicius) confirm that Plato taught esoterically:

• τὸ ἓν καὶ ἡ ἀόριστος δυάς (the One and the Indefinite Dyad) as the two supreme ἀρχαί
• Numbers are generated as the first mixture of peras and apeiron
• Ideal numbers are prior to mathematical numbers
• The One is ἐπέκεινα τοῦ νοῦ (beyond even intellect)

Modern scholarship often dismisses this as “Neoplatonic invention.” The Tübingen-Milan school (Krämer, Gaiser, Reale, Findlay) has established beyond reasonable doubt that Proclus and Plotinus are faithful to Plato’s agrapha dogmata.

Key Technical Vocabulary (with Greek)

• αὐτὸ καθ’ αὐτό – self-predicated essence
• μετέχειν / μέθεξις – to participate / participation
• παρούσια – presence of the Form in the particular
• χώρα – receptacle, third kind
• ἐπέκεινα τῆς οὐσίας – beyond being
• νοῦς / νόησις – intellect / intellection
• διάνοια – discursive reasoning
• δόξα / πίστις / εἰκασία – opinion / belief / imaging
• ἀνάμνησις – recollection
• μέγιστα γένη – the five greatest kinds
• τὸ μεταξύ – the intermediate
• αἴτιον τοῦ εἶναι – cause of being
• ἀρχὴ ἀναπόθετος – unhypothesized principle
• ἄπειρος δυάς – indefinite dyad
• ἕν – the One (absolute principle)
• ζῷον αὐτοκαθ’ αὐτό – the Intelligible Living-Being
• ὑπόστασις – hypostasis (later term for substantial reality)
• πρόοδος / ἐπιστροφή / μονή – procession / reversion / remaining (Neoplatonic triad rooted in Plato)

Study Questions (advanced)

1. Explain precisely why the chōra must be neither Form nor sensible, and why calling it “space” or “matter” is a category error.
2. In what sense is the Good “beyond being”? Is this a negation of being or a hyper-essential affirmation?
3. Reconstruct the argument in Sophist 251–259 showing that the Forms must admit κίνησις and θάτερον without collapsing into Heraclitean flux.
4. Why does Plato demote mathematics to the second-highest segment of the Line? What does this reveal about the difference between διάνοια and νόησις?
5. Using only Phaedo 72–78 and Meno 81–86, show that anamnesis is not a psychological theory but an ontological proof of the soul’s pre-existence and affinity with the Forms.

Next, in our third lecture and we will enter the Aristotelian counter-revolution: hylomorphism, the critique of separation, the four causes, energeia/dunamis, the prime mover, and the rehabilitation of physis against Plato’s χωρισμός.