But orthodox religious scholasticism, in alliance with subjective idealist philosophy, has not ceased to flog Spinoza as a ‘dead dog’, treating him a… - Benedictus de Spinoza

Nothing is more absurd than ownership claimed for ideas. Hegel did, to be sure, use many of Schelling's ideas for his philosophy, but Mr. Schelling would never have known what to do with these ideas anyway. He always just philosophized, but was never able to produce a philosophy. And besides, one could certainly maintain that Mr. Schelling borrowed more from Spinoza than Hegel borrowed from Schelling. If Spinoza is some day liberated from his rigid, antiquated Cartesian, mathematical form and made accessible to a large public, we shall perhaps see that he, more than any other, might complain about the theft of ideas. All our present‑day philosophers, possibly without knowing it, look through glasses that Baruch Spinoza ground.

Spinoza's thought is completely idealistic when it is presented as negative thought, when it develops the bourgeois utopia, living it in the extreme, abstract consequences of its spiritual idyll; it is, in contrast, completely materialistic as soon as it is reassembled in a constructive way, inverting the impossibility of an ideal world in the materialistic tension of its components and embracing these in a practical project, in a violent dynamism of worldly liberation. "Benedictus maledictus": never has a philosopher been more rightly hated by his times, a bourgeois and capitalist epoch.

I should attempt to treat human vice and folly geometrically... the passions of hatred, anger, envy, and so on, considered in themselves, follow from the necessity and efficacy of nature... I shall, therefore, treat the nature and strength of the emotion in exactly the same manner, as though I were concerned with lines, planes, and solids.