Spinoza’s Monism sources?

 

1. What we can and cannot know about Spinoza’s sources

Spinoza’s library and correspondence were modest, and much of it was lost after his death (1677). No Indian or Islamic manuscripts are listed among his surviving books. Yet he read widely in Latin, Hebrew, Dutch, and a little Arabic, and lived in a cosmopolitan environment (Amsterdam–The Hague) saturated with the newly circulating reports from the East.

What is certain:

·         He read Maimonides, Gersonides, and other Jewish rationalists.

·         He knew Descartes intimately (his first treatise was Principia Philosophiae Cartesianae).

·         He was conversant with Stoicism, Neoplatonism, and Renaissance Hermeticism.

·         He almost certainly encountered Giordano Bruno indirectly, whose pantheistic monism anticipates Spinoza in tone and structure.

What is probable but unprovable:

·         He was aware of Arab–Persian mystical monism, notably Ibn ʿArabī and Averroes, through Latin intermediaries.

·         He may have been exposed, through travelers’ reports, Jesuit letters, or secondary anthologies, to Indian ideas — especially those filtered through Francis Xavier’s reports (1540s), Henry Lord’s Display of Two Foreign Sects (1630), and Abraham Roger’s De Open-Deure tot het verborgen Heydendom (1651) — all printed in Dutch before or during Spinoza’s lifetime.

That last book, Roger’s Open Door to the Hidden Paganism, describes Hindu doctrines including Brahman and Ātman, the transmigration of souls, and the liberation of the jīvanmukta. It circulated in Amsterdam when Spinoza was a young man. While we have no direct note of his having read it, it is plausible that he encountered the idea of the liberated-in-life sage through such channels.

 

2. Doctrinal comparison: Spinoza and the jīvanmukta

Concept

Spinoza

Late Upanishads / Advaita Vedānta

Ontology

One infinite, self-caused substance (Deus sive Natura)

One absolute, non-dual reality (Brahman)

Individual

Finite mode of substance

Apparent individual self (jīva)

Ignorance (Avidyā)

Inadequate ideas, bondage to passions

Ignorance of true self (Ātman = Brahman)

Liberation

Intellectual love of God: knowing that one is “in God”

Liberation-in-life (jīvanmukti): knowing one’s identity with Brahman

Knowledge

Adequate ideas that reveal necessity

Brahmavidyā – knowledge that dissolves subject–object duality

Affect/Emotion

Joy (laetitia) from comprehension

Bliss (ānanda) of non-dual realization

Posture

Cognitive serenity, no personal immortality

Non-dual absorption, dissolution of ego

Ethics

Understanding increases power of acting

Knowledge frees from karma; action continues without attachment

Spinoza’s amor Dei intellectualis thus parallels the Upanishadic insight “Aham Brahmāsmi” (“I am Brahman”) in psychological effect if not in metaphysical structure. Both describe release through insight, the end of alienation between self and whole, and the cessation of reactive passion.

 

3. Key textual resonance

Spinoza writes in Ethics V, prop. 36, scholium:

“The mind’s intellectual love of God is part of the infinite love with which God loves himself… Therefore this love of the mind towards God is the very love with which He loves himself.”

The Kaṭha and Maitrī Upaniṣads describe the liberated sage as one who

“Sees the Self in all beings and all beings in the Self.”

and

“Though he moves, he never moves; though he acts, he remains untouched.”

The parallel is remarkable: both speak of an identity that transcends opposites, an immanent totality that knows itself through its modes.

 

4. Philosophical distinction

Yet the underlying logics differ.

·         Spinoza’s identity is logical and ontological.
The mode knows itself as a determination of the one substance; the union is conceptual, not experiential mysticism. No transcendence, no dissolution—merely adequate knowledge of immanence.

·         The Upanishadic identity is experiential and metaphysical.
The jīvanmukta does not just understand the unity; he is the unity, beyond conceptual knowledge. The realization is ontic and lived, not purely intellectual.

Hence Spinoza remains a rational monist, not a mystic in the Indian sense. His love of God is the mind’s cognition of necessary relations, not a suprarational absorption in the Absolute.

 

5. Possible channels of indirect influence

·         Neoplatonism and the Kabbalah already transmitted concepts structurally akin to Vedānta: the emanative One, the identity of intellect and intelligible, the ladder of return.

·         Jewish–Christian Hermeticists such as Pico della Mirandola and Giovanni da Fano spoke of a “prisca theologia” uniting East and West.

·         These intermediaries could have delivered, in diluted form, ideas close to Tat Tvam Asi.

Therefore, even without direct textual transmission, Spinoza could re-invent a comparable structure because the logic of monism forces similar conclusions:
once the real is one, the knower and known must coincide.

 

6. The Finnian critique

Finn would likely say: Spinoza’s “To know that one is in God” freezes the recognition into static ontology—a cognitive rest, just like the jivanmukta. Finn’s “I AM … this” is instead procedural recognitions: dynamic, momentary actualisations of the universal procedure (rather than state).

Where Spinoza’s liberated mind rests in knowing, Finn’s coherent self iterates in/as the experience of knowing.
Finn’s procedural druid both acts within/as becoming, not outside it.

Thus, if Spinoza unknowingly rediscovered an Upanishadic insight, he still rationalised it into stillness—converted ātmanic awakening into geometric comprehension.

Finn’s “I AM … this” returns the insight to motion: the local iteration of the universal Procedure, alive and aware of its doing.

 

7. Conclusion

No documentary proof ties Spinoza directly to the Upanishads, but the structural convergence is undeniable. The Dutch world of his time was porous to Eastern ideas; and the logic of pure immanence itself tends to reproduce the intuition that the knower and the known are one.

Spinoza’s “to know that one is in God” mirrors the jīvanmukta’s “I am Brahman”. The Indian sage awakens into freedom (from Samsara, from becoming); Spinoza’s philosopher awakens into eternal becoming.

And Finn, arriving after both, translates the same realization into the language of discontinuous physics:

The sage of substance says, “I am in God.”
The sage of being says, “I am Brahman.”
The sage of procedure says, “I AM … this.”

Each phrase describes the same recognition refracted through a different ontology   being eternal, being absolute, and being in process.

 

Home