Beauty, my dear Sir, is not so much a quality of the object beheld, as an effect in him who beholds it. If our sight were longer or shorter, or if ou… - Benedictus de Spinoza

He alone is free who lives with free consent under the entire guidance of reason

The second point to be considered is the method adopted by Spinoza for setting forth his philosophy; it is the demonstrative method of geometry as employed by Euclid, in which we find definitions, explanations, axioms, and theorems. Even Descartes made it his starting-point that philosophic propositions must be mathematically handled and proved, that they must have the very same evidence as mathematics. The mathematical method is considered superior to all others, on account of the nature of its evidence; and it is natural that independent knowledge in its re-awakening lighted first upon this form, of which it saw so brilliant an example. The mathematical method is, however, ill-adapted for speculative content, and finds its proper place only in the finite sciences of the understanding. In modern times Jacobi has asserted (Werke, Vol. IV. Section I. pp. 217-223) that all demonstration, all scientific knowledge leads back to Spinozism, which alone is a logical method of thought; and because it must lead thither, it is really of no service whatever, but immediate knowledge is what we must depend on. It may be conceded to Jacobi that the method of demonstration leads to Spinozism, if we understand thereby merely the method of knowledge belonging to the understanding. But the fact is that Spinoza is made a testing-point in modern philosophy, so that it may really be said: You are either a Spinozist or not a philosopher at all. This being so, the mathematical and demonstrative method of Spinoza would seem to be only a defect in the external form; but it is the fundamental defect of the whole position. In this method the nature of philosophic knowledge and the object thereof, are entirely misconceived, for mathematical knowledge and method are merely formal in character and consequently altogether unsuited for philosophy. Mathematical knowledge exhibits its proof on the existent object as such, not on the object as conceived; the Notion is lacking throughout; the content of Philosophy, however, is simply the Notion and that which is comprehended by the Notion. Therefore this Notion as the knowledge of the essence is simply one assumed, which falls within the philosophic subject; and this is what represents itself to be the method peculiar to Spinoza's philosophy.

Over the centuries, there have been periodic calls for the herem against Spinoza to be lifted. Even David Ben-Gurion, when he was prime minister of Israel, issued a public plea for ‘amending the injustice’ done to Spinoza by the Amsterdam Portuguese community. It was not until early 2012, however, that the Amsterdam congregation, at the insistence of one of its members, formally took up the question of whether it was time to rehabilitate Spinoza and welcome him back into the congregation that had expelled him with such prejudice. There was, though, one thing that they needed to know: should we still regard Spinoza as a heretic? Unfortunately, the herem document fails to mention specifically what Spinoza's offences were – at the time he had not yet written anything – and so there is a mystery surrounding this seminal event in the future philosopher's life. And yet, for anyone who is familiar with Spinoza's mature philosophical ideas, which he began putting in writing a few years after the excommunication, there really is no such mystery. By the standards of early modern rabbinic Judaism – and especially among the Sephardic Jews of Amsterdam, many of whom were descendants of converso refugees from the Iberian Inquisitions and who were still struggling to build a proper Jewish community on the banks of the Amstel River – Spinoza was a heretic, and a dangerous one at that.