Spinoza's philosophy introduced an unprecedented theoretical revolution in the history of philosophy, probably the greatest philosophical revolution … - Benedictus de Spinoza

The philosopher John Toland, in the early 18th century, insisted that the terms 'Spinozism' and 'pantheism' are synonymous. Toland says that "Moses was, to be sure, a Pantheist, or, if you please, in more current terms, a Spinosist", while Spinoza's pantheism was taken for granted by Moses Mendelssohn, Gotthold Lessing and Friedrich Jacobi, in their famous Pantheismusstreit of 1785. More recently, this interpretation also appears in both the scholarly literature and popular representations of Spinoza's thought. In the recently published Cambridge Dictionary of Philosophy we read that "Spinoza is the most distinguished pantheist in Western philosophy". But the problem with calling Spinoza a 'pantheist' is that pantheism is still a kind of theism.

I proposed not to bore you with any more of my metaphysics or ethics, but I will say a word by way of conclusion. If you want any more, go to Spinoza and Schopenhauer, where I get mine.

Truly, all the lively, the lively men from the school of Kant, became Neospinozists! In other words, they became Spinozists. The Kantians became Spinozists—what happened? Why did the most prominent Kantians—Fichte, Schelling, Hegel, the best philosophical brains Germany has ever produced—become Spinozists? One will try in vain to find an answer to this question in our histories of philosophy, which do not even ask that legitimate and obvious question. And there is no other answer to it than this one: that it could not have been otherwise, since these truly philosophical men necessarily saw and felt how different Benedict Spinoza's stance within philosophy was from that of Kant, who—to say it in my blunt way—had nothing in common with philosophy.