Christine and I haven't raised our children. A whole community of selfless Christians has contributed to helping them become faithful, competent adults.

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.

I have healed the sick by the power of the God. I have spoken with the gift of tongues.

By the time it becomes obvious that a technology will have truly disruptive impact, it is often too late to take action. This is one reason why we are such advocates of using theory to try to analyze industry change. Conclusive evidence that proves that a company needs to take action almost never exists. In fact, the data can fool management, lulling them into a false sense of security.

When the functionality of a product or service overshoots what customers can use, it changes the way companies have to compete. When the product isn't yet good enough, the way you compete is by making better products. In order to make better products, the architecture of the product has to be interdependent and proprietary in character.

You can't find returns in investments you haven't made.

Businesses want to think in terms of categories. Consumers want us to think in terms of their needs.