Abstract
In this paper I assess the sense of the odd expression that occurs in the explanation of the definition of desire, at the end of the third part of the Ethics: causa conscientiae, the cause of consciousness. I intend to show that the sense and the limits of the conception of consciousness that can be inferred from the analysis of this definition and its explanation can shed a new light on the reasons why Spinoza refuses the Cartesian thesis on the right order of Philosophy: self-consciousness shall not be the point of departure of philosophy, not because it would be dependent on knowledge of the external world, but because it is a derivative concept in the sense that the qualification of thinking things as conscious beings supposes some ontological conditions that are not always met: finitude and duration. To establish that I will claim that the aim of the text where the expression arises is to elucidate the conditions under which the concept of consciousness applies, and not to express differently the same thesis of E2P23 and E3P9sc. We will see that Spinoza's point there is not that the human mind – or the human body – must be determined by an external cause in order to be conscious of itself, but that it has to be determined by any affection, regardless of its origin. Therefore, the inside-outside approach must be replaced by the consideration of the duplication of the determination. This twofold structure is the conceptual element that must be added to the definition of appetite in order to account for the cause of consciousness, and its analysis will show that for Spinoza only finite modes of thought that exists in the duration can be conceived as conscious beings.