There are landscapes in which we feel above us not sky but space. Something larger, deeper than sky is sensed, is seen, although in such settings the sky is invariably immense. There is a place between the cerebrum and the stars where sky stops and space commenses, and should we find ourselves on a particular prairie or mountaintop at a particular hour [...] our relationship with sky thins and loosens while our connection with space becomes as solid as bone.

Half Asleep in Frog Pajamas (1994)