Miles' symbol for what Spencer called the "Unknowable" force behind all organic life. Cf. the opening stanza in her poem "Green Fire," similar in image and tone to the present FSC:

Listen! you may hear him laughing, as he lights the living fire,

Under all the drip and gurgle of the fall--

You may catch him his fairy fluting in the mocker's fervid lyre,

Or a sighing, singing echo's faintest call.

If the thrush's harp of dawn lures you downward, on and on

To the wildest haunt of wings that none can tame,

Through the lustrous gloom may glance greener glory like a lance--

Close your eyes, for you have found the magic flame!