From the very first, Serenity had been more than just a metal hull. A firefly was a symbol; of illumination, of the soul of a person, of life and fragility. Fireflies drifting over a battlefield soothed away pain with beauty, represented hopes for a new beginning. Their light drew love from far away, and, encircling, could bring two people together.
-- Eidolon (Chapter 16) by Bytemite