the colonel said I shouldn't tell them how the neutrons work and all the details because we want to keep things separate, so just tell them what to do to keep it safe.

On returning to Brisbane, I realised fairly quickly that I am an experimentalist at heart. A career as a diagnostic virologist was not for me!

But these days, if I have to choose between building my tennis résumé and building my family, I choose the latter.

Take no notice of anyone you don’t respect. […] Take no notice of anyone with a ­gender agenda. A lot of men still think that women lack imagination of the fiery kind.

I read that at a key fork in the road moment for me where I just sold CD Baby and had a ton of money. I was like, “What to do now?” And I read this book from this filthy rich old man being entirely honest, and I thought I should just learn from his experience. ... So if what I’m doing seems weird, it’s because I took his advice to heart and I’ve quit the game.

The proudest achievement of my life at that time was that software. Wonderfully organized, extensible, and efficient: the culmination of everything I’d learned about programming in ten years. After a successful relaunch and Christmas rush, I was looking at my plan for 2008 and beyond. All my plans needed a huge effort for little reward, but were required for future growth. I had broken it into about 20 projects, each taking 2 to 12 weeks. But I wasn’t excited about any of them.

When I decided to sell my company, I already had enough. I live simply. I don’t own a house, a car, or even a TV. The less I own, the happier I am. The lack of stuff gives me the priceless freedom to live anywhere anytime. So I didn’t need or even want the money from the sale of the company. I just wanted to make sure I had enough for a simple comfortable life. The rest should go to music education, since that’s what made such a difference in my life.

Do you have a big visionary master plan for how the world will work in twenty years? Do you have massive ambitions to revolutionize your industry? Don’t feel bad if you don’t. I never did. A year and a half after starting CD Baby, it was just me and John, my first employee, running it out of my house. One night, I decided I should think more about the long-term future of this thing. I sat with my diary for a few hours of introspection. Afterwards, I wrote John an email that went like this: “I think there’s a chance that this thing might be huge one day, so we better start preparing for that now. I mean some day, we might have a thousand artists. We might need a third employee! We’d need three computers, and need to figure out how to network them together. We might even need to start moving CDs into the garage, since eventually they might fill up the living room. Yes, I know it sounds grandiose, but I think things are headed that way.” Years later, after I had 100,000 artists and 85 employees, John would often get a good laugh out of this letter I sent him in 1999. Journalists would ask, “What’s your long-term goal?” I’d say, “I don’t have one. I surpassed my goals long ago. I’m just trying to help musicians with whatever they need today.” So please don’t think you need a huge vision. Just stay focused on helping people today.

Yeah, anybody asks me about it, my advice was always, do not do it. In fact, it still is. Somebody just asked me last week, I was like, do not do it.

And this is my only pair of pants. These three glasses, I don’t even think about it because I just think about having enough.