"But the other Ainur looked upon this habitation set within the vast spaces of the World, which the Elves call Arda, the Earth; and their hearts rejoiced in light, and their eyes beholding many colours were filled with gladness; but because of the roaring of the sea they felt a great unquiet. And they observed the winds and the air, and the matters of which Arda was made, of iron and stone and silver and gold and many substances: but of all these water they most greatly praised. And it is said by the Eldar that in water there lives yet the echo of the Music of the Ainur more than in any substance else that is in this Earth; and many of the Children of Ilúvatar hearken still unsated to the voices of the Sea, and yet know not for what they listen."

(J.R.R. Tolkien, from the Ainulindalë)