If you have a negative thought - 'I can't stand my boss' - it perpetuates a negative worldview. But if you supplant each negative thought with three positive ones, you begin to restructure your brain.

People talk about the brain weakening as it ages. Mine feels stronger.

When the brain is silent, the executive function, which is this part of the brain that makes decisions, can work much better. So when you get quiet, you make better decisions. You're also more rested - you're not as reactive.

'Liberation' is an interesting word because you can be liberated from external things and also from your internal dialogue.

You have to prepare yourself first before you can create any kind of change for your loved ones.

I want to know where joy lives. I'd interview scientists, religious leaders and heads of state. I'd want to find out exactly what makes people happy. I'd want to look into the biology, the chemistry of the human brain.