This book investigates how we should form ourselves in a world saturated with technologies that are profoundly intruding in the very fabric of our selfhood. How do we recognize that smart technological environments, imaging technologies and smart drugs increasingly shape who and what we are and influence who we ought to be? Tackling this issue requires going beyond the persistent and stubborn inside-outside dualism and recognizing that what we consider our "inside" self is to a great extent shaped by our "outside" world. Inspired by various philosophers – especially Nietzsche, Peirce and Lacan –this book demonstrates that the values, goals and ideals that humans encounter in their environments not only shape their identities but also enable them to critically relate to their present state. The author argues against understanding technological self-formation in terms of making ourselves better, stronger, and smarter. Rather, we should conceive it in terms of technological sublimation, which redefines the very notion of human enhancement. In this respect the author introduces an alternative, more suitable theory, namely Technological Sublimation Theory (TST). Extimate Technology will be of interest to scholars and advanced students working in philosophy of technology, philosophy of the self, phenomenology, pragmatism, and history of philosophy.