Yes, your subjective experience has its locus in your brain, but that is not at all the same thing as &quot;Everything you will ever experience is all in your head.&quot;  There is an external reality that is separate from your brain.  Some of the things you experience (like getting hit on the head with a sledgehammer) involve processes that operate in this external reality, and others (like dreams or psychosomatic pain) don&#x27;t.  This is a salient and useful distinction which &quot;Everything you will ever experience is all in your head&quot; only serves to obscure.