In this letter, Einstein uses sharp words to express his disquiet about the acausality that the quantum theory is showing in more and more places\:
In my view the idea that an \u2026 electron can, of its own free will, choose the moment and direction in which it will leap away is unbearable. If that is the case, I'd rather be a cobbler \u2013 or even work in a casino \u2013 than be a physicist.