Of first importance in composition is the notion of Light and Dark, to which Line is second. In the tone design line is but the edge of the masses. Line as the basis of the form of the design is reduced to a few forms which with modifications become the framework for all pictorial structure. (See Fundamental Forms.) Line as an element of beauty sufficient of itself to become subjective is rare, an exception in pictorial art. (See Line)

The Æsthetics of Line must be comprehended and felt in its symbolism. The form into which lines may lead the subject should have the full knowledge of the composer.