Abstract

The literature on Dreams of a Spirit-Seer typically emphasises the ways that Kant’s complex 1766 work prefigures his critical turn. Kant indeed criticises Wolffian «dreamers of reason» and defines metaphysics as a «science of the limits of human reason». It has not been noted, however, that Kant’s first restriction on human knowledge in Dreams is targeted at knowledge of fundamental physical forces. Moreover, Kant criticises the ‘pneumatological’ laws of mental forces, insisting that these cannot be known through analogy with physical forces. This paper presents the historical context of Kant’s claims and argues that his critique of the philosophical concept of force (Kraft) is primarily in dialogue with one of Wolff’s most renowned critics, Crusius. On this basis, I contend that Kant’s examination of our capacity to know fundamental physical and mental forces is an important aspect of his early critique of metaphysics. I defend my account by contrasting it with Alison Laywine’s interpretation.