Pantheism is as old as philosophy. It was taught in the old Greek schools — by Plato, by St. Augustine, and by the Jews. Indeed, one may say that Pan… - Benedictus de Spinoza

The brilliance of the solution of the problem of the relation of thinking to the world of bodies in space outside thought (i.e. outside the head of man), which Spinoza formulated in the form of the thesis that thought and extension are not two substances, but only two attributes of one and the same substance, can hardly be exaggerated. This solution immediately rejected every possible kind of interpretation and investigation of thought by the logic of spiritualist and dualist constructions, so making it possible to find a real way out both from the blind alley of the dualism of mind and body and from the specific blind alley of Hegelianism. It is not fortuitous that Spinoza’s profound idea only first found true appreciation by the dialectical materialists Marx and Engels. Even Hegel found it a hard nut to crack. In fact, on the decisive point, he returned again to the position of Descartes, to the thesis that pure thought is the active cause of all the changes occurring in the ‘thinking body of man’, i.e. in the matter of the brain and sense organs, in language, in actions and their results, including in that the instruments of labour and historical events.

...For millennia, wrongdoers overtaken by punishment have felt no different than Spinoza with regard to their 'offence': 'something has gone unexpectedly wrong here', not 'I ought not to have done that'–, they submitted to punishment as you submit to illness or misfortune or death, with that brave, unrebellious fatalism that still gives the Russians...

...He [Lessing] even felt that the highest compliment he could confer on his friend Moses Mendelssohn, whom he greatly admired, was to call him a "second Spinoza." Mendelssohn, one of the fathers of the modern German enlightenment, was an adherent of Leibnitz. As such he could not be a follower of Spinoza, although he, too, admired his personality. Furthermore, he failed to understand Spinoza, for he could never free himself from Bayle's presentation of Spinoza's doctrine. Nevertheless, this very Mendelssohn, by his controversy with Jacobi about Lessing's relationship to Spinoza, was instrumental in making the latter a potent force in German letters. It is interesting to observe that even those thinkers who dedicated their lives to the cause of anti-Spinozism paid the highest tribute to his personality.