If you defer investing your time and energy until you see that you need to, chances are it will already be too late.

Every time you take someone figuratively by the hand and introduce him or her to Jesus Christ, you will feel how deeply our Savior loves you and loves the person whose hand is in yours.

At the beginning of almost every industry, the available products and services are so expensive to own and complicated to use that only people with a lot of money and a lot of skill have access to them. A disruptive technology is an innovation that simplifies the product and makes it so affordable that a whole new population of people can now have one and use it at the beginning for simple applications, and then it improves to the point that it makes the old technology obsolete.

Management is the most noble of professions if it's practiced well.

In my first career I had founded my own company, with a group of MIT professors, before coming to Harvard to finish my doctorate, and so I had a deep respect for the brains, talent, and dedication of managers. That made it hard for me to believe the attributions in the business press that stupid management was to blame. So I looked elsewhere for an explanation.

If the technology is disruptive, on the other hand, the odds are that at the end of the transition, the leaders will have been toppled and new companies will be on top.

Don't worry about the level of individual prominence you have achieved; worry about the individuals you have helped become better people.