One of the things anxiety educates you in is how deeply physical thought can be, how concrete. In anxiety, there is no time to luxuriate in abstractions. It’s just you and your mind, which has fists and is using them. It may be dualistic and logically untenable to posit the situation as You v. Head; it may not make sense philosophically. But in the throes of anxiety? In the cognitive shit? There’s really no other way to think about what’s going on.