I examine the (mediated) correspondence between Spinoza and Robert Boyle concerning the latter’s account of fluidity and his experiments on reconstitution of niter in the light of the epistemology and doctrine of method contained in the Treatise on the Emendation of the Intellect. I argue that both the Treatise and the correspondence reveal that for Spinoza, the proper method of science is not experimental, and that he accepted a powerful under-determination thesis. I argue that, in contrast to modern versions, Spinoza’s (...) form of naturalism was a highly rationalist and anti-empirical one. I conclude with a brief account of the value of experience and experimentation for Spinoza’s scientific method. (shrink)

In this chapter, I first turn to Spinoza’s obscure “ideas of ideas” doctrine and his claim that “as soon as one knows something, one knows that one knows it, and simultaneously knows that one knows that one knows, and so on, to infinity” (E2p21s). On my view, Spinoza, like Descartes, holds that a given idea can be conceived either in terms of what it represents or as an act of thinking: E2p7 (where Spinoza presents his doctrine of the “parallelism” of (...) minds and bodies) primarily concerns the former way of conceiving of an idea while E2p21 primarily concerns the latter. I propose that in E2p21, Spinoza makes a few crucial points about an adequate idea conceived as the “idea of the idea,” or as the activity of thinking: 1) when one has an adequate representation of p, one automatically knows that one is thinking an adequate representation of p, and 2) this reflective knowledge cannot be improved. I then turn to E2p43, “he who has a true idea at the same time knows that he has a true idea, and cannot doubt the truth of the thing." This is a denial of skepticism, but I think we need to be careful. E2p21 and E2p43 rule out the most hyperbolic doubts like those we see in Descartes's Third Meditation (AT VII 36), so it is the case that thinkers need no additional validation for the “adequate ideas of properties of things” and “common notions” employed in "cognition of the second kind," or reason. However, a reasoning thinker might nevertheless be troubled by doubts about the extramental world. As I have argued in other work, we can take Spinoza as following Descartes at least this far: once our reasoning thinker comes to adequate ideas of God and God’s relation to things, their ideas cannot be rendered doubtful. Here I concede that because one can reason to these adequate ideas of God and God's relation to things, scientia intuitiva is not unique in removing doubt. However, scientia intuitiva may still be distinctive in the way it removes doubt. (shrink)

In this article, I consider two interpretations of Spinoza's account of the good life in recent literature, which I call the social activist model and the solitary intellectualist model, in order to shed light on his underexamined views on solitude within this context. The former model has gained more support than the latter due to Spinoza's criticism of the solitary life and the importance he ascribes to friendship and living cooperatively with others within his corpus. While I recognize its strengths, (...) I am skeptical as to whether the social activist model appreciates the complexity of Spinoza's account of the good life in the Ethics. For even though Spinoza clearly values friendship, he has a largely pessimistic view of those he calls ordinary people, which bears on the possibility of friendship between the philosopher and ordinary people. Furthermore, intuitive knowledge is unlike reason in that it concerns an asocial and intellectual insight beyond an identification with humanity and imaginative dimensions of ordinary life. It is, thus, conducive to what psychologists James Averill and Louise Sundararajan have called authentic solitude to the extent that it brings about a metaphysical awareness of our ontological status as finite modes of God. Although neither of the aforementioned models offers an entirely accurate representation of Spinoza's understanding of freedom in the Ethics, considering them enables us simultaneously to appreciate the complexity of Spinoza's thought and recognize a problematic tension within it. This tension is due to the gap between, on the one hand, his pessimistic view of ordinary people and his intellectualist portrayal of the philosopher who becomes disconnected from ordinary people as she increases her knowledge of the eternal, and his insistence on the shareability of knowledge and the importance he ascribes to the task of bringing ordinary people to enlightenment, on the other. (shrink)

Contributors: Steven Barbone, Laurent Bove, Edwin Curley, Valérie Debuiche, Michael Della Rocca, Simon B. Duffy, Daniel Garber, Pascale Gillot, Céline Hervet, Jonathan Israel, Chantal Jaquet, Mogens Lærke, Jacqueline Lagrée, Martin Lin, Yitzhak Y. Melamed, Pierre-François Moreau, Steven Nadler, Knox Peden, Alison Peterman, Charles Ramond, Michael A. Rosenthal, Pascal Sévérac, Hasana Sharp, Jack Stetter, Ariel Suhamy, Lorenzo Vinciguerra.

Metaphysics and ethics are two distinct fields in academic philosophy. The object of metaphysics is what is, while the object of ethics is what ought to be. Necessitarianism is a modal doctrine that appears to obliterate this neat distinction. For it is commonly assumed that ought (at least under normal circumstances) implies can. But if necessitarianism is true then I can only do what I actually do. Hence what I ought to do becomes limited to what I in fact do. (...) This is one widespread way of construing the danger that necessitarianism poses for ethics. There is, however, another way in which this collapse of what is with what ought to be can be construed. One could think of what is as already being what ought to be, of the two being one. On this picture, everything that is, is already valuable. In this thesis I explore the theory that being is intrinsically valuable. I do so by investigating the philosophy of perfection present in the works of the early modern rationalist Spinoza. For in his philosophy of perfection, I argue, we find being and value to be perfectly aligned. Hence, my reading challenges a widespread interpretation, according to which (ontological) perfection is divested of normativity in Spinozism. The position that all being is intrinsically valuable since it is perfect may be thought to be incompatible with human perfectionism. For what room can there be for human progress toward an ideal of perfection if all that exists, is necessarily perfect? The goal of the thesis is to respond to this question by providing a systematic interpretation of the metaphysics of human perfectibility in Spinoza’s philosophy. In order to achieve this goal, I undertake two tasks. First, I examine Spinoza’s multi-faceted philosophy of perfection. I distinguish between ontological and teleological perfection. Moreover, I argue that since Spinoza maintains that everything is perfect to the extent that it is, perfection shoulders the role of a transcendental within his system. In order to highlight the normative significance of transcendental perfection, I compare Spinoza’s thought with the transcendental theory of the good in Thomas Aquinas. In addition, I distinguish between ontological and speculative perfection. Speculative perfection is conscious awareness of ontological perfection. Second, I show how infinity plays an essential role in Spinoza’s ethics by indicating how we, by availing ourselves of this notion, are able to acquire a perspective on reality from which its ontological perfection may be discovered. On this basis, I am able to demonstrate the (relatively understudied) ethical and soteriological importance of Spinoza’s conception of infinity. I argue that it is because (a) Spinoza’s ideal of human perfection is speculative, and because (b) one will be able to establish the (ontological) perfection of things by deducing it from the divine essence only when one considers this essence absolutely infinite, that (c) the absolute infinity of the divine essence plays a significant role in Spinoza’s account of human perfection as consisting in conscious awareness of the value of all being. (shrink)