Each day as I travel through downtown Tucson, I am amazed at how quickly the most ancient of human behaviors have changed. For as long as there have been Homo sapiens - roughly 200,000 years - people have filled their lives principally with two activities: talking directly with other people, and doing physical things.

Remember that breath walking - as with any meditation technique - should not be pursued with a grim determination to 'get it right.' The point is to cultivate openness, relaxation and awareness, which can include awareness of your undisciplined, wandering mind.

I have argued for years that we do not have a health care system in America. We have a disease-management system - one that depends on ruinously expensive drugs and surgeries that treat health conditions after they manifest rather than giving our citizens simple diet, lifestyle and therapeutic tools to keep them healthy.

I think instead [of happiness] we should be working for contentment... an inner sense of fulfillment that's relatively independent of external circumstances.

Meditation while walking has a long, noble history in ancient spiritual disciplines.

In my experience, the more people have, the less likely they are to be contented. Indeed, there is abundant evidence that depression is a 'disease of affluence', a disorder of modern life in the industrialized world.

There's no limit to what working with the breath can accomplishmy own first-hand experiences with this natural healing method have convinced me that breathing well may be the master key to good health. I recommend breath work to all my patients.