In Spinoza, at the origin of the Modern world, metaphysical theory and the theory of science are given in complete agreement for the first time. They… - Benedictus de Spinoza

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.

And therefore we can see just how constructive this Spinozian difference is, just how constructive this negativity really is! The organic interweaving of these two motifs is fundamental in the history of European philosophy. Spinoza is the first to mold this logical mechanism that bourgeois philosophy would constantly and continually try to abrogate during its subsequent development. In Kantianism, as in classical idealism, Spinoza continually remains the object of opposition and polemic: What is destroyed is precisely the intersection between the negation of the ideology and the construction of the world, the inherence of the limit, of the materiality, to the infinite.

Neutrality toward Spinoza set in once one was able to admit that the "modern worldview," whose victory was decisively aided by Spinoza's metaphysics, does not, or does not entirely, coincide with this metaphysics. But even at this stage it was still generally maintained, and even emphasized, that among the three great Western philosophers of the seventeenth century — Descartes, Hobbes, and Spinoza — Spinoza was the most important one because, he was the most progressive one. He alone had drawn certain consequences from the foundations of modern philosophy, which became fully clarified only in the nineteenth century and which henceforth determined the general consciousness.