Drifting across the vast space, silent except for wind and footsteps, I felt uncluttered and unhurried for the first time in a while, already on desert time.

When you give yourself to places, they give you yourself back; the more one comes to know them, the more one seeds them with the invisible crop of memories and associations that will be waiting for when you come back, while new places offer up new thoughts, new possibilities. Exploring the world is one the best ways of exploring the mind, and walking travels both terrains.

One soft humid early spring morning driving a winding road across Mount Tamalpais, the 2,500-foot mountain just north of the Golden Gate Bridge, a bend reveals a sudden vision of San Francisco in shades of blue, a city in a dream, and I was filled with a tremendous yearning to live in that place of blue hills and blue buildings, though I do live there, I had just left there after breakfast.

Of course women's walking is often construed as performance rather than transport, with the implication that women walk not to see but to be seen, not for their own experience but for that of a male audience, which means that they are asking for whatever attention they receive.

A person in her twenties has been a child for most of her life, but as time goes by that portion that is childhood becomes smaller and smaller, more and more distant, more and more faded, though they say at the end of life the beginning returns with renewed vividness, as though you had sailed all the way around the world and were going back into the darkness from which you came.

The thing the nature of which is totally unknown to you is usually what you need to find, and finding it is a matter of getting lost. The word "lost" comes from the Old Norse los, meaning the disbanding of an army, and this origin suggests soldiers falling out of formation to go home, a truce with the wide world. I worry now that many people never disband their armies, never go beyond what they know.

No matter how deeply you come to know a place, you can keep coming back to know it more.

If you walk a city, if you love a city, if you put in your miles and years with open heart and mind, the city will reveal itself to you. Maybe it won't become yours, but you will become its - its chronicler, its pilgrim, its ardent lover, its nonnative son or native daughter or defender.

Women have routinely been punished and intimidated for attempting that most simple of freedoms, taking a walk, because their walking and indeed their very beings have been construed as inevitably, continually sexual in those societies concerned with controlling women's sexuality.