This book explores how meaning emerges in use and how the “I” takes shape within language games in the broadest sense. Proceeding from the impossibility of a context-independent metalevel, it brings philosophical reflection into dialogue with insights from science—from space and time to evolution and neuroscience. In this way, a coherent perspective unfolds in which language, knowledge, and subjectivity are not grounded outside their practice, but understood within it.This book does not begin with a theory, but with an experience: that meaning reveals itself only in use, and that every definition already speaks before it explains. From this realization, it became impossible to continue believing in a place outside language from which the “I”—or language itself—could be grounded.