Sand and Foam

I AM FOREVER walking upon these shores, Betwixt the sand and the foam, The high tide will erase my foot-prints, And the wind will blow away the foam. But the sea and the shore will remain Forever. Once I filled my hand with mist. Then I opened it and lo, the mist was a worm. And I closed and opened my hand again, and behold there was a bird. And again I closed and opened my hand, and in its hollow stood a man with a sad face, turned upward. And again I closed my hand, and when I opened it there was naught but mist. But I heard a song of exceeding sweetness.