Our world requires that decisions be sourced and footnoted, and if we say how we feel, we must also be prepared to elaborate on why we feel that way...We need to respect the fact that it is possible to know without knowing why we know and accept that - sometimes - we're better off that way.

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

That's your responsibility as a person, as a human being - to constantly be updating your positions on as many things as possible. And if you don't contradict yourself on a regular basis, then you're not thinking.

Every cop will tell you that their real job is being a social worker. That's what they do all day. The large majority of police officers in this country never even draw their gun, let alone fire it. They do conflict resolution, right? And if that's their job, why do they need to look like they're an occupying force?

I would say first of all, anyone who wants to challenge the status quo always gets that response. Ninety percent of the time, that's just bull. That's just the way in which people choose to prop up their own privilege or their own particular position. So mostly I shrug it off.

The key to good decision making is not knowledge. It is understanding. We are swimming in the former. We are desperately lacking in the latter.

It's not how much money we make that ultimately makes us happy between nine and five. It's whether or not our work fulfills us. Being a teacher is meaningful.