The thing about inventing is you have to be both stubborn and flexible. The hard part is figuring out when to be which.

I strongly believe that missionaries make better products. They care more. For a missionary, it's not just about the business. There has to be a business, and the business has to make sense, but that's not why you do it. You do it because you have something meaningful that motivates you.

Percentage margins don't matter. What matters always is dollar margins: the actual dollar amount. Companies are valued not on their percentage margins, but on how many dollars they actually make, and a multiple of that.

My view is there's no bad time to innovate.

Where you are going to spend your time and your energy is one of the most important decisions you get to make in life.

If you double the number of experiments you do per year you're going to double your inventiveness.

We were hoping to build a small profitable company; and of course, what we've done is build a large, unprofitable company.