Chapter 5 treats Kant’s notions of genius and aesthetic ideas. It argues that his discussion of genius forms a kind of deduction for the possibility of producing and then judging objects that exceed our own capacities. In this, it focuses on Kant’s descriptions of spirit as what nature gives both to the genius and thereby also to the work of beautiful art, thus allowing it to enliven our minds. This playful enlivening through spirit is what makes it possible for the human mind to present, in art, what otherwise exceeds it, namely aesthetic ideas. Here, we find that human beings belong to a nature that is much more expansive than the one ruled by the understanding in the first Critique; nature here is the source of spirit and liveliness. The chapter concludes by highlighting Kant’s repeated observations that nature is expressing itself through genius, and links this to the communicability that underlies the judgment of taste more generally.