Then no ripples, but the water is as still as glass.

The sun goes down.

The sky glows.

Twilight comes.

One star appears, and green banks and trees and sky and stars are all reflected in the quiet mirror of the lake, and you are the lake, and you are quiet and refreshed and rested and ready to get up and go on with your work--to go on with it, too, better and more quietly than when you left it.
Or, another way to quiet your mind and to let your imagination help you to a better rest is to float on the top of a turbulent sea and then to sink down, down, down until you get into the still water at the bottom of the sea.