Maybe I’m paranoid, but in experience what comes next is typically some mystic mumbo-jumbo or talk about things we “just can’t understand” etc. then usually the speaker is religious.
I’d be happy to be wrong. The religion argument is just boring.
One problem is that the more nuanced and plausible weaker versions of empiricism are not held by a number of prominent thinkers in the sciences. Instead, many of them (experts in their respective domains) continue to believe in and espouse semi-silly, self-defeating, and untenable versions of empiricism.
Whether Bach actually does is perhaps arguable. What the parent was referring to when he mentioned western rationality being myopic at times is probably something like what I described above.
Then if you see emotions as a subset of rationality, then it's again your rational view of the world and how you make sense of it, but it's not the position held by most people.