Drugs don't have spiritual potential, human beings have spiritual potential. And it may be that we need techniques to move us in that direction, and the use of psychoactive drugs clearly is one path that has helped many people.

Limit or eliminate late-night computer and television viewing. A computer or TV screen may seem much dimmer than a light bulb, but these screens often fill your field of vision, mimicking the effects of a room filled with light.

The most common objection that I hear to walking as exercise is that it's too easy, that only sweaty, strenuous activity offers real benefits. But there is abundant evidence that regular, brisk walking is associated with better health, including lower blood pressure, better moods and improved cholesterol ratios.

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

Dietary fat, whether saturated or not, is not a cause of obesity, heart disease or any other chronic disease of civilization.

The more people have, the less content they seem to be. In America, the cultural expectation that we're to be happy all the time and our children are to be happy all the time is toxic, and I think that really gets in the way of emotional well-being.

Conscious breath control is a useful tool for achieving a relaxed, clear state of mind.