While walking, my eyes are scanning rapidly looking for those defining images that will accurately record what we have seen. As I photograph, I notice that I am constantly adjusting the focus of my lens through the full range from closest focus to absolute distance - 16 inches to infinity.

Likewise, my mind is zooming from the immediate to the theoretical. Here, now, is my heartbeat, the hot sun teasing forth beads of sweat from my forehead, the light caress on my face of a cool breeze from up the valley, the intricate shape of a small leaf pressed close to the ground which I have bent down to examine. So long ago that I hiked in the mountains. My life now is entirely in the city.