The code that most prisoners live by is an extension of the masculine roles they were taught growing up, how they were conditioned about what it means to be a man: you've got to be strong, you've got to be tough, you've got to be in charge.

Childhood is so important. Without a loving one, you're vulnerable throughout your life. We're all the things our parents are - the good and the not so good. Thankfully, I have a wonderful wife who's a brilliant mother.

There's often an assumption you're more privileged if you belong to a family with people who have made a success.

If you are deeply connected with yourself, with your energy, staying awake to yourself in the moment, other prisoners tend to leave you alone.

Yoga class is intimate even just from the standpoint of taking off your socks. Exposing your bare feet can be a big deal. You may be an African American next to a Caucasian or a Latino. But once practice begins and we drop in, separation dissolves.

Since the late 1970's, the main focus of prisons has been punishment, not rehabilitation. It's hard to believe, but you would be hard-pressed to find a meaningful violence-prevention class in a federal or state penitentiary. And 'we the people' are footing the bill to keep these folks imprisoned. It costs on average $46,000 a year to keep an adult incarcerated in California and about the same for New York State.

When you're on the yard, prisoner politics dictate that you only socialize with your own race. If you fraternize with other races, you can get taught a painful lesson. And there are inmates with a level of consciousness who feel it's their duty to enforce this segregation.