At the other extreme, an abundantly supportive environment can cause an unmotivated, unskilled person to practice very healthy habits. When I go to a health spa, it’s easy to eat delicious, low-calorie, nutritious food at every meal, because that’s all that is served. I can go for a swim when I wake up, go for a long hike before lunch, do yoga before I take a late afternoon nap, and take time to reflect on priorities in my life in the evening, because there are talented and charming experts to guide me, interesting, motivated people to accompany me, and all the time I need to do whatever I want. The biggest shortcoming of a spa experience is that the wonderful supports don’t come with me when I leave. Most people revert to