In fact, researchers have settled on what they believe is the magic number for true expertise: ten thousand hours.

There are lots of issues more important than where billionaires donate their money.

You may hate Hillary Clinton and you may have good reason for hating Hillary Clinton, but Hillary Clinton is one person who even if she's elected will be gone one day and you still have the task of keeping American democracy going.

Trump is an innovator who has shown how out of step the political establishment was. Which I think, probably, in the long term will be healthy. We have to figure out how to reinvigorate our political institutions and he's demonstrating to us the urgency of that task.

You can learn as much - or more - from one glance at a private space as you can from hours of exposure to a public face.

If you are going to do something truly innovative, you have to be someone who does not value social approval. You can't need social approval to go forward. Otherwise, how would you ever do the thing that you are doing?

Sometimes the most modest changes can bring about enormous effects.