Baruch Spinoza, the excommunicated Jew, made the Jewish cultural position in the West not only tenable, but impregnable. But the same Baruch Spinoza … - Benedictus de Spinoza

While Schelling was wrestling with Plato, Spinoza, and Kant, his contemporary Hegel was struggling with Spinoza exclusively. In Hegel, Spinoza reached the height of his influence upon the German mind. Hegel was the most influential, although not the most original, German philosopher since the days of Kant. His system was more an absorption of other systems than an original creation. Therein lies the secret of his influence. He brought all the philosophical tendencies and moods of his time to a conclusion. With him the pantheism of his period attained its highest development and became the conscious and necessary connection of the mind and the world. During his entire philosophical career, Hegel constantly wrestled with Spinoza and for a time was entirely in his clutches. It was while under this influence that Hegel said that in order to refute Spinoza one must first accept him. In his lectures on the history of philosophy he says, "That Spinoza is the main point in modern philosophy, it is either Spinozism or no philosophy at all." He defended Spinoza against the reproach that his philosophy was atheistic and destructive of morality. In his later years, however, when he became more conservative, he changed his attitude toward Spinoza. He said, "that the philosophy of the "Amsterdam hermit" was an antiquated point of view, that his method was 'wooden,' that his proofs were formal tortures, that the attributes did not emanate from the substance and that the modi did not emanate from the attributes." But it was reserved for his old age to discover that Spinozism was philosophically objectionable because it did not tally with Christianity.

When a man is prey to his emotions, he is not his own master.

If Spinoza had in fact tried to construct his philosophical system by the method that our contemporary positivism would have recommended to him, it is not difficult to imagine what he would have produced as a ‘system’. He would only have brought together the purely mechanical and religious, mystical ‘general ideas’ that were guiding all (or almost all) naturalists in his day. Spinoza understood very clearly that religious, theological mysticism was the inevitable complement of a purely mechanistic (geometrical, mathematical) world outlook, i.e. the point of view that considers the sole ‘objective’ properties of the real world to be only the spatial, geometrical forms and relations of bodies. His greatness was that he did not plod along behind contemporaneous natural science, i.e. behind the one-sided, mechanistic thinking of the coryphaei of the science of the day, but subjected this way of thinking to well substantiated criticism from the angle of the specific concepts of philosophy as a special science. This feature of Spinoza’s thinking was brought out clearly and explicitly by Friedrich Engels: ‘It is to the highest credit of the philosophy of the time that it did not let itself be led astray by the restricted state of contemporary natural knowledge, and that from Spinoza right to the great French materialists it insisted on explaining the world from the world itself and left the justification in detail to the natural science of the future.’ [Dialectics of Nature] That is why Spinoza has come down in the history of science as an equal contributor to its progress with Galileo and Newton, and not as their epigone, repeating after them the general ideas that could be drawn from their work. He investigated reality himself from the special, philosophical angle, and did not generalise the results and ready-made findings of other people’s investigation, did not bring together the general ideas of the science of his day and the methods of investigation characteristic of it, or the methodology and logic of his contemporary science. He understood that that way led philosophy up a blind alley, and condemned it to the role of the wagon train bringing up in the rear of the attacking army the latter’s own ‘general ideas and methods’, including all the illusions and prejudices incorporated in them. That is why he also developed ‘general ideas and methods of thought’ to which the natural science of the day had not yet risen, and armed future science with them, which recognised his greatness three centuries later through the pen of Albert Einstein, who wrote that he would have liked ‘old Spinoza’ as the umpire in his dispute with Niels Bohr on the fundamental problems of quantum mechanics rather than Carnap or Bertrand Russell, who were contending for the role of the ‘philosopher of modern science’ and spoke disdainfully of Spinoza’s philosophy as an ‘outmoded’ point of view ‘which neither science nor philosophy can nowadays accept’. Spinoza's understanding of thinking as the activity of that same nature to which extension also belonged is an axiom of the true modern philosophy of our century, to which true science is turning more and more confidently and consciously in our day (despite all the attempts to discredit it) as the point of view of true materialism.