The labor into which a heart has poured its whole love--where will it have its say, to excite and inspire, and when?
Seeing the moon, he becomes the moon, the moon seen by him becomes him. He sinks into nature, becomes one with nature. The light of the "clear heart" of the priest, seated in the meditation hall in the darkness before the dawn, becomes for the dawn moon its own light.
The winter moon becomes a companion, the heart of the priest, sunk in meditation upon religion and philosophy, there in the mountain hall, is engaged in a delicate interplay and exchange with the moon; and it is this of which the poet sings.