Abstract
Recently the literature dedicated to the Kantian reception of Spinoza has experienced a significant increase. There are several studies dedicated to mapping the presence of the latter in both pre-critical and critical writings of the former, and different are the results achieved by each. Yet, with the exception of a few references to the section in which Spinozism is presented as the only alternative to transcendental idealism, the Critique of Practical Reason is almost never mentioned nor, even less, is it customary to look at it in an attempt to find something that attenuates the contrast between the two philosophies. The aim of this essay is to show how it is precisely in the second Critic, and in particular by introducing the Fact of Reason, that Kant thinks, so to speak, together with Spinoza. Indeed, in 1788 the moral law works as an adequate idea that makes us active causes, and the experience of the freedom procured by the conscience that we have of it is, therefore, very similar to the experience of eternity illustrated by the fifth book of the Ethics.