Einstein on Kant: Synthetic A Priori Concepts

Here is an excerpt containing Einstein’s thoughts on Kant’s synthetic a priori concepts. Found after reading a comment on another blog claiming Einstein called A Critique of Pure Reason “the most influential book he ever read”. Turns out Einstein actually wrote a little bit about Kant’s a priori distinction. Not entirely sure what Einstein thinks of the rest of transcendental idealism, as it would seem to me at least that if you were to disagree with Kant’s distinctions on analytic/synthetic a priori/ a posteriori concepts then it makes it slightly difficult moving forward.