WHAT IS THE RAIN ABOUT?

He passed his hand under the cascading water. Fuck, it was cold! He nearly yanked his hand away in a nervous reaction to the icy water, but he didn't. His hand stayed and the water continued to envelop him. He watched fascinated as water seemed to make decisions, some of it dividing either side of his hand, whilst other parts filled his palm, dribbling through his fingers. 

"Fundamental" he murmured, "fundamental."