A radical and transformative thought goes nowhere without the willingness to challenge convention.

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.

I became convinced that knowing lots of people was kind of skill, something that the diligent can overcome.

The difference between a crime of evil and a crime of illness is the difference between a sin and a symptom.

Insight is not a lightbulb that goes off inside our heads. It is a flickering candle that can easily be snuffed out.

There's no idea that can't be explained to a thoughtful 14-year-old. If the thoughtful 14-year-old doesn't get it, it is your fault, not the 14-year-old's.

One of the things I think the police have to do is to stop behaving like armies.