Abstract

This paper investigates the philosophy of the eighteenth-century German physicist Georg Christoph Lichtenberg (1742–1799), situating his views in the context of early-modern views of the self, and providing an interpretation and assessment of his remarks on self-consciousness and personal identity in his Waste Books. In these remarks, which include his famous observation that we are warranted only in saying “it thinks” rather than “I think,” Lichtenberg criticizes the rationalist metaphysics of the soul for confusing conceivability with cognizability and argues that we cannot know ourselves to be a persisting substantial self on the basis of the observations of inner sense. We are justified only in claiming that the self is a series of interrelated conscious representations and sensations. Lichtenberg’s rejection of the substantial self in favor of this view of the self also leads him to conclude in other remarks that personal identity consists in the continuity of consciousness produced by memory regardless of the material basis upon which consciousness supervenes.