Dr. Rangan Chatterjee

And it's certainly where I'm at in my life.

So I very much resonate with this.

As I said to you when you walked into my house this morning, there's less of the what.

There is plenty of what in this book in terms of what can you do to help improve your immune system health.

But there's a lot of the why, I mean, why should you care?

Why should you do these things?

In a limited time budget, why should you spend your time actually doing these things?

And as you eloquently put in the introduction,

The conversation around longevity is both science and philosophy.

You can't just look at it through the lens of science or, you know, this is how you should eat, this is how you should move, you know, this is how many hours sleep you should get.

Okay, great, helpful.

And if you don't have the bigger why, if you're not living in alignment of figuring out why should you do those things, purely on a behavior change aspect,

I think this is one of the main reasons why people can't make habits stick in the long term.

I think about behavior change in two levels.

There's, you know, tricks for habits, right?

Make it easy, stick it onto an existing habit, you know, design your environment in a way that supports the behavior you want.

Those things are very, very helpful.

And I think there's a much deeper level to behavior change that we don't think about enough.

And I really strongly have found that

people's behaviors will always end up matching the person who they believe themselves to be.