123. The first thing to consider is the tone of the surface upon
which you are going to paint. You then take a tone differing from the
ground-tone, in value, in color, or in color-intensity, you put it in a
certain position, and you spread it over a certain extent of space. In
so doing you give to the space a certain shape. This is the process of
Painting, as distinguished from the process of Drawing. In Drawing we
think of lines and outlines first. In Painting we think of Tones first,
of positions, measures, and shapes afterwards.