If your mental

picture is grey or in perfect black with the eyes closed, Imagine that you're pouring black ink or black dye over it.

Note that the clearness of the mental picture improves.

Look at a page of fine print, then close your eyes and imagine the white spaces between the lines to be perfectly white.

If they appear to be greyish white, Imagine that you are painting the white spaces between the letters, inside the letters and between the lines with the white paint or whitewash.

And open your eyes for a fraction of a second and note that the white spaces between the lines will appear whiter if you do not make an effort to see either the black letters or the white spaces.

The interesting thing with the first one on the demonstrate is really so much he always talks about is really about relaxing the eyes.

There