Maria Popova’s introduction to her meditation on John Burroughs’ collection Birds and Poets is a remarkable distillation of what makes a life.
A person is a perpetual ongoingness perpetually mistaking itself for a still point. We call this figment personality or identity or self, and yet we are constantly making and remaking ourselves. Composing a life as the pages of time keep turning is the great creative act we are here for. Like evolution, like Leaves of Grass, it is the work of continual revision, not toward greater perfection but toward greater authenticity, which is at bottom the adaptation of the self to the soul and the soul to the world.
Emphasis mine.