Optimizing return on capital will generate less growth than optimizing return on education.

The reason why it is so difficult for existing firms to capitalize on disruptive innovations is that their processes and their business model that make them good at the existing business actually make them bad at competing for the disruption.

The principles of disruptive innovation are indeed intended to be guidelines to assist managers both in introducing disruptive innovations as well as identifying disruptive developments in their market.

Clayton M. Christensen Quotes