But actually theory is very practical. Gravity is a theory, for example. It allows you to predict that if you step off a cliff you will fall; you don't have to collect data on that.

If you take away religion, you can't hire enough police.

Capitalism has taught us that markets are always more efficient than hierarchical managerial coordination. But in a situation where those three conditions aren't met, I can't outsource or partner with you because markets don't function in the absence of sufficient information.

I have been blessed to see visions of eternity; and events in my future that have been important for me to foresee, have been revealed to me.

If you want to make better theory, you've got to use the best that's available and look through the lens of another discipline to see if you can uncover more anomalies. By looking at the phenomena of failure from the perspective of sales, marketing, finance, general management, and the equity markets, I was able to see things that Rebecca [Henderson] hadn't.

How could Digital's collapse be so precipitous? It's because, in many ways, financial performance data is misleading. As you move up to the top of the market, you're getting rid of the less profitable products at the low end and adding business with more attractive margins at the high end. The rate of unit volume growth might be tapering off as you pursue these smaller markets, but your margins actually look better. So Wall Street rewards your stock price until you hit the ceiling.

Generally, the technology that enables disruption is developed in the companies that are the practitioners of the original technology. That's where the understanding of the technology first comes together. They usually can't commercialize the technology because they have to couple it with the business model innovation, and because they tend to try to take all of their technologies to market through their original business model, somebody else just picks up the technology and changes the world through the business model innovation.