some relevant lines excerpted from the writing of Octavio Paz, translated from the Spanish by Eliot Weinberger:
The perpetual tide, the unstable tide, the punctual tide.
The tide, blue and black, green and purple, dressed in the sun and undressed in the moon, spark of noon and heaving breath of night.
The tide weaves and unweaves, embraces and separates, is never the same, and never another.
The tide is honest, and eventually returns all of its drowned.