NIGHT after night within the grove
The night wind spares the sacred fire -­
The breath made visible of love,
Of worship and desire.

I set the tripod at thy shrine;
The silver bowl, the amber flame,
And in the dark where no stars shine
I speak thy name.

By the high name I call on thee
Which only I, thy priestess, know.
I tread thy dance in ecstasy,
Sweet steps and slow.

O God, the hour has come. Appear!
I have performed the appointed rite -­
The dance, the fire; I long to hear
Wings in the night.

Alice Duer Miller

http://www.poemhunter.com/poem/invocation-30/