A Vagabond Jew from Lithuania: A Poem on Salomon Maimon It took a vagabond Jew from Lithuania   to strike the wick that Königsberg’s sage   had hid and let go out in dark’s old age.     Said the synagogue’s rude son:   Let there be German with a Yiddish tongue ,   and from his restless mind   concepts flowed   like fire onto the page.     With quid facti?  and  quid juris?    as his lamps,   he lit the lecture halls   and shadowed nooks   of Europe with flame incandescent,  

What fact makes a principle true? Quid Facti. That is the question.