A search for the origins of a well-known rabbinical expression leads to the New Testament, and specifically to the book of Matthew.
Read more on Forward: http://forward.com/articles/178044/its-a-hebrew-thing-you-get-it-or-you-dont/
You Either Get It or You Don’t https://mosaicmagazine.com/picks/uncategorized/2013/06/you-either-get-it-or-you-dont/
About the author: Philologos, the renowned Jewish-language columnist, appears twice a month in Mosaic. Questions for him may be sent to his email address by clicking here.