Abstract
This article defends what I call the atmospheric claim about trust: at least one form of trust manifests itself in human life in a manner that is like an atmosphere (generalized, ambient, and diffuse). I also provide a provisional defense of the claim that trust is a necessary condition for the thriving of something that matters to us. I offer a phenomenological sketch of existential trust. Existential trust is a primordial and atmospheric (generalized, ambient, and diffuse) manifestation of trust that constitutes a fundamental way of being in relationship with the world as a whole such that one feels supportively upheld, vulnerably open, orientationally attuned, and demanded in relation to this world, with the overall effect of feeling at home in it.