Dr. Rangan Chatterjee

And Nir, I would say one of the...

biggest things that has changed the quality of my life over the past five or even 10 years is really understanding this idea that you can choose your beliefs.

And as you eloquently say in the book,

you know, whether they're true or not is semi-irrelevant.

It's, are they working for you?

Before we get into that, one that you said that I just want to touch base upon, I'm not a flat earther, just to be clear here, right?

But a lot of the time throughout history,

we have absorbed things and thought they were facts and found out later they were not actually facts.

So there would have been a time in history where saying the world is spherical, people would probably call you crazy, right?

So even what qualifies as a fact

I think we need to sometimes soften our viewpoint of facts.

Of course, some things are objective.

I'm not disputing that, but I think what happens when you start to update your beliefs is that you take a much softer approach to the world.

You're less fixed in your viewpoint.

You're more able to update things, even facts.

Like, I don't know, as a doctor,

In the 70s and 80s, we thought antibiotics were amazing, bacteria were bad.

That was a fact back then.

Bacteria are bad, antibiotics kill them.

And then we've learned over the years, well, wait a minute, there's a ton of bacteria in our guts that are actually really good.