All in the mind?

You remember what the Jedi say:

Don’t think — feel

And we all talk in terms of reason and emotion being different things; of thinking and feeling being semi-independent aspects of our state of being. We talk about the "head" and the "heart" as separate vessels for these aspects. But they’re not.

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The heart doesn’t really control emotions, it’s just a muscle that pumps blood around the body. And while emotions do have a bio-chemical nature, and as such, are things we genuinely feel, they’re still controlled by the brain; which itself has an electro-chemical nature, and as such, an equally genuine physical presence.

So what is the difference between thinking and feeling? Isn’t it all just in the mind?