It doesn't use shading, but it does use stroke length variations.

Depth of friendship does not depend on length of acquaintance.

It is of great use to the sailor to know the length of his line, though he cannot with it fathom all the depths of the ocean.

Consumers shouldn't infer that there is something particularly suspect going on if they see price variations. . . . If you saw the same price at every station it might indicate competition is working perfectly, but it isn't inconsistent with competition that there's a variety of prices.

Happiness makes up in height for what it lacks in length.

In the surface of the paper there is only length and width-there is no such thing as thickness.