There’s a saying in gyms, maybe you’ve heard it—that you have to use your mind to control your body or else your body will control your mind. But what’s even better than using one to control the other ...

Some years ago, I had a colonoscopy without being fully anesthetized, and was able to watch on a computer screen the shifting views of the insides of my colon. I was both fascinated and disturbed.

This is an edited transcript of an episode of “The Ezra Klein Show.” You can listen to the conversation by following or subscribing to the show on the NYT Audio app, Apple, Spotify, Amazon Music, ...

We all struggle with self-control sometimes. We tell ourselves only one more piece of chocolate, one more glass of wine, one more episode of a binge-worthy series before bed, but then carry on ...