The simplest line suggests direction; divides space; has length, width, tone, and texture; and may describe contour. As soon as the line begins to change direction—to move in curved or angular fashion, to fluctuate in width, to have rough or smooth edges—its active and descriptive powers increase many times. Every mark made on paper, whether it be a thoughtful line or just a scribble, inevitably will convey something of the maker to the sensitive observer.