I have a musician friend who, after reading Mountains, told me, "When I read the book, I wanted to quit music altogether and become a doctor." I told him, "Do you really think you can be a better doctor than you are a musician? Nobody needs you as a lousy doctor. Just be the one-of-a-kind, brilliant musician you are, and divert your success somehow to benefit the poor." You can achieve so much more this way.

Since 2007, we've been giving one dollar, one euro - whatever the local currency - of every ticket sold to Partners In Health and Kanpe. I think if you have a working band, that's about the easiest thing you can do - you just set it up and let it work!

I have a musician friend who, after reading Mountains, told me, "When I read the book, I wanted to quit music altogether and become a doctor." I told him, "Do you really think you can be a better doctor than you are a musician? Nobody needs you as a lousy doctor. Just be the one-of-a-kind, brilliant musician you are, and divert your success somehow to benefit the poor." You can achieve so much more this way.

It's important to understand the work that's being done, and to make sure it's actually helping. And sometimes, by working on it myself, I get a better grasp of the challenges and complexities of the task, and I'm able to talk about it better. That's why a balance of actual work and awareness is good, because they feed each other.