It's as if you were interested in fashion and your neighbor when you were growing up happened to be Giorgio Armani.

Often a sign of expertise is noticing what doesn't happen.

There is a simple way to package information that, under the right circumstances, can make it irresistible. All you have to do is find it.

The Rule of 150 says that congregants of a rapidly expanding church, or the members of a social club, or anyone in a group activity banking on the epidemic spread of shared ideals needs to be particularly cognizant of the perils of the bigness. Crossing the 150 line is a small change that can make a big difference.

What track needs to figure out: how to engage us between the races. Instead, the entire off-the-track conversation is about doping. This is how you kill a sport.

The sense of possibility so necessary for success comes not just from inside us or from our parents. It comes from our time: from the particular opportunities that our place in history presents us with.

If you want to bring a fundamental change in people's belief and behavior...you need to create a community around them, where those new beliefs can be practiced and expressed and nurtured.