A walk yesterday along the mall was a study in shapes. The National Museum of the American Indian loomed before me, its curved stone walls a link to the mesas and pueblos of our native past.

Beside it was a straight sidewalk, the stricture into which the native past was placed. We, the inhabitants of the 21st century, we live with them both.

Closest to the surface is the straight line, the crossroads, the grid. But underneath its order are the curved paths of our past. The deer trails and the wagon train trails, the old roads that wound among hills and ridges.

I walked yesterday along the straight path, but I kept my eyes trained on the curves.

Photo: visitingdc.com