"Drawing is the honesty of art. To draw does not mean simply to reproduce contours: drawing does not consist merely of line. Drawing is also expression, the inner form, the plane and modeling. See what remains after that .Drawing includes three and a half quarters of the content of painting." Jean-Auguste Dominique Ingres.

"Drawing is one of many ways to making an image; it is the process of making marks on a surface by applying pressure from or moving a tool on the surface. These marks may represent what the artist sees when drawing, a remembered or imagined scene or abstraction, or, in the case of automatic drawing, may have much to do with the automatic motion of the artist's hand across the paper (or other surface). ..." Source: Wikipedia