Contemporary western society has witnessed an emerging trend of people identifying as "spiritual but not religious." In this volume, King-Ho Leung seeks to take seriously the notion of "spiritual but not religious" as a philosophical concept. Drawing on insights from philosophers such as Martin Heidegger, Hannah Arendt, Gilles Deleuze, and Giorgio Agamben, Spiritual Life and Secular Thought develops a philosophical definition of "spirituality" that is not only applicable to religious and non-religious outlooks alike, but moreover can shed light on the character of human experience and existence in the world.