Sounds a bit dramatic, right? Like the opening line of a classic melodrama. We’re also well aware it leans into “clickbait” territory. But when it comes to Spinoza, you’ll find that this title holds a lot more weight than you might expect. So, who are we talking about? Baruch Spinoza is one of the most original and influential minds in the history of philosophy. Often ranked alongside Descartes and Leibniz as one of the three great rationalists of the 17th century, his work left an indelible mark on the Enlightenment. Like many great thinkers, he dedicated his life to understanding “the truth.” The questions of what knowledge actually is, how we acquire it, and what it ultimately serves are the beating heart of his philosophy. If you ever find yourself questioning the foundations of what you “know,” or wondering if knowledge is more than just a tool—if it carries an existential weight—then diving into Spinoza is a must. His approach to knowledge aims to move past mere sensory impressions to reach pure truth through reason and intuition.
To give you the punchline upfront: for Spinoza, knowledge isn’t just about knowing facts; it’s about placing things within their necessary role in the universe. This perspective doesn’t just invite us to think more accurately—it invites us to live more freely and calmly. So, how did we get here? Let’s find out together.
A Brief Look at Baruch Spinoza
Baruch Spinoza was a 17th-century philosopher living in Amsterdam whose ideas were lightyears ahead of his time. He was still in his early twenties when he was excommunicated from his Jewish community, simply because his thinking followed reason rather than tradition. As you can imagine, bucking tradition back then was a recipe for disaster, but Spinoza didn’t stop at religion.
He refused to bow to any religious or political authority, choosing instead to earn his living by grinding lenses for spectacles. This quiet trade gave him plenty of time to think. Because of this, Spinoza viewed philosophy not as a dusty academic pursuit, but as a way of life. He kept himself in the background and let his ideas take center stage; he was a thinker who was systematic enough to spark a revolution, yet sincere enough to remain simple.
After being excommunicated, Spinoza was attacked by a knife-wielding assailant in a dark alley one night. Luckily, he survived with only minor wounds. From that day on, he kept the torn cloak he was wearing as a reminder of the attack. To him, it was the “price of thought,” and he wore that scar with pride.
While he might seem like an intimidating philosopher at first glance, Spinoza was actually quite grounded—a man trying to build a bridge between rationalism and existentialism. His life was simple. He lived a solitary existence, never married, and we have almost no record of his romantic life. But that doesn’t mean he was a man devoid of love. On the contrary, love was the center of his philosophy; his love wasn’t directed just at people, but at something much larger: God.
In Spinoza’s view, this love was indistinguishable from a love for nature, because God and nature were one and the same. In this sense, Spinoza never felt truly alone, and he never lost his love for life. He held onto this until his final years, though time eventually took its toll. The very work he loved—grinding lenses—filled his lungs with glass dust, eventually leading to tuberculosis. He embraced even that. He met his death as a natural conclusion to life. When he passed away in 1677, solitary but at peace, he left behind no riches or titles. However, his immortal work, Ethics, which remains vital today, stands as a unique testament to human reason and moral courage.
The Three Kinds of Knowledge
As we mentioned at the start, Spinoza was chasing truth. For anyone pursuing those two concepts, knowledge is always front and center. It was for Spinoza, too. In his book Ethics, he outlines three different levels of knowledge.
The first is what he calls imagination, or experiential knowledge. To him, this type of knowledge is incomplete, fragmented, and often misleading. Think of believing the Sun revolves around the Earth, or perceiving an object as larger just because you’re looking at it from a distance. For Spinoza, this is the breeding ground for ignorance and superstition. Now, don’t think he’s calling everything we experience “garbage.” He isn’t saying it’s all false, but rather that it’s often accidentally correct, relying on luck and a shaky foundation. Thankfully, we have alternatives.
The second type of knowledge is what he calls ratio, or rational reasoning. This is knowledge gained through general concepts and logic. It includes mathematical and logical principles. For instance, knowing that the interior angles of a triangle add up to 180 degrees falls into this category. This knowledge is consistent and universal. Yet, it still has its limits—it can’t answer everything. There is only one type of knowledge that can do that, and it does so quietly: Intuitive knowledge.
This is the highest level of knowledge. It is the direct grasp of the necessity of a thing and its essence in God. Spinoza suggests that through this knowledge, a person begins to see things from God’s perspective. We know that last sentence might make you raise an eyebrow, but it will all click into place soon. In this form of knowledge, intuition is paramount. In a world where God creates everything, understanding those things through intuition is, to Spinoza, the most correct path. At this point, it’s clear that this knowledge is still rooted in reason, but “reasoning” (the step-by-step process) is not part of it. If we try to “reason out” something that should be grasped intuitively, our basic experiences lead us astray. Think of it like a mathematician who, instead of grinding through long calculations, suddenly “sees” a geometric truth. That sudden flash of insight is the mathematical version of intuitive knowledge. It’s a form of enlightenment that, for Spinoza, comes directly from God.
Spinoza didn’t see God as some entity sitting in the sky, managing the world from the outside. To him, God was nature. The trees, the animals, the people, the planets… they were all parts of God. That’s why he used the phrase “God or Nature” (Deus sive Natura). That thought was radical then—and honestly, it still is—because people were used to thinking of God as something separate from and superior to nature.
To summarize: Spinoza’s understanding of knowledge isn’t just a conceptual exercise; it’s a call for moral transformation. He believes knowledge will make us “free,” but this freedom doesn’t come from randomness; it arises from understanding necessity and living in harmony with it. Intuitive knowledge isn’t just grasping God (or nature) intellectually; it’s forming a deep, internal bond with it. Spinoza calls this sub specie aeternitatis—the ability to view events from the perspective of eternity. This perspective provides a solid inner structure that can withstand the fragility of our daily lives.
In the history of modern philosophy, which we often start with Descartes, Spinoza points in a completely different direction: Knowledge is not just the mind representing objects; it is understanding the necessary nature of those objects. This perspective doesn’t just offer us new ways to think; it gives us the chance to re-evaluate ourselves, our passions, and our place in the universe. Spinoza’s narrative may not fit our everyday sensibilities, but everything he explained through numbers and logic (what you’re reading here in prose) is, at its core, a fundamental part of our existence.
References and Further Reading
Deleuze, G. (1988). Spinoza: Practical philosophy (R. Hurley, Trans.). City Lights Books. https://monoskop.org/images/d/d8/Deleuze_Gilles_Spinoza_Practical_Philosophy.pdf
Nadler, S. (2018). Spinoza: A life (2nd ed.). Cambridge University Press. https://www.google.com/search?q=https://books.google.com.tr/books?id=iSe95FJrfeYC
Nadler, S. (2022, November 21). Spinoza. The Stanford Encyclopedia of Philosophy. https://plato.stanford.edu/entries/spinoza/
The Editors of Encyclopaedia Britannica. (n.d.). Judaism. Encyclopedia Britannica. https://www.britannica.com/topic/Judaism/Benedict-de-Spinoza
Originally published in Turkish at Doğa Filozofu.
