Abstract

It is argued, first, that although Spinoza's early Treatise on the Emendation of the Intellect does show evidence of a foundationalist approach to the justification of knowledge, there are good reasons to think he came to find such an approach unsatisfactory; and second, that the Ethics notion of certainty as adequate knowledge of one's knowledge is a justificational concept which is holistic in that any instance of such certainty depends on knowledge of the entire basic metaphysical system. Finally it is shown that Spinoza's having come to hold a nonlinear view regarding the justificational structure of knowledge explains why he chose to present his philosophy in the geometric form, and why he never succeeded in formulating a method of discovery.