I found incredible kindness, dignity and hospitality in both Iraq and Afghanistan - am only alive because of it - the most worthwhile lesson of a twenty month walk to these countries was a deepening appreciation of the kindness of strangers.

I found incredible kindness, dignity and hospitality in both Iraq and Afghanistan - am only alive because of it - the most worthwhile lesson of a twenty month walk to these countries was a deepening appreciation of the kindness of strangers.

Change can only come from local citizens and politicians - it cannot be imposed by well-meaning foreigners - not least because a society like Afghanistan or Iraq is suspicious of outsiders and often resistant to change. I am not going to get drawn into the ethics of intervening in other countries. My concern is the practical question. Can you actually achieve change in this way? My guess is we can stop wars sometimes as in the Balkans and topple regimes - but that the other stuff - such as corruption is not within our power to effect and alter.

The world isnt one way or another. Things can be changed very, very rapidly by someone with sufficient confidence, sufficient knowledge and sufficient authority.

This idea that failure is not an option: It makes failure invisible, inconceivable and inevitable.

The question shouldn't be what we ought to do, but what we can do.

I had been walking one afternoon in Scotland and thought: Why don't I just keep going? There was, I said, a magic in leaving a line of footprints stretching across Asia.