In order to get one of the greatest inventions of the modern age, in other words, we thought we needed the solitary genius. But if Alexander Graham Bell had fallen into the Grand River and drowned that day back in Brantford, the world would still have had the telephone, the only difference being that the telephone company would have been nicknamed Ma Gray, not Ma Bell.

We spend a lot of time and effort trying to figure out who's going to be a good NFL quarterback, and we do a very bad job of it. We don't really know. And we also spend a lot of time trying to figure out who will be a good teacher, and we're really bad at that too. We don't know if someone is going to be a good teacher when they start teaching. So what should we do in those situations in which predictions are useless?

People who bring transformative change have courage, know how to re-frame the problem and have a sense of urgency.

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.

You can't concentrate on doing anything if you are thinking, “What's gonna happen if it doesn't go right?

Through embracing the diversity of humans beings, we will find a sure way to true happiness.

The kinds of errors that cause plane crashes are invariably errors of teamwork and communication.