My mirror probes down to the heart. I write words on the forehead and around the corners of the mouth. My human faces are truer than the real ones. - Paul Klee

Already at the very beginning of the productive act, shortly after the initial motion to create, occurs the first counter motion, the initial movement of receptivity. This means:
the creator controls whether what he has produced so far is good.

Now Delaunay wrote and sent me an article by himself about himself.

Beyond the constructive elements of the picture, I studied the tonalities of nature by adding layer upon layer of diluted black watercolour paint. Each layer must dry well. In this way a mathematically correct scale of light and dark values is the result. Squinting facilitates our perception of this phenomenon in nature.