The Atlantic author did some reasonable checking for the purported King quotation. "Searching Martin Luther King Jr. quote pages for the word "enemy" does not turn up this quote, only things that probably wouldn't go over nearly so well, like 'Love is the only force capable of transforming an enemy to a friend.' I'm pretty sure that this quote, too, is fake."
For a book-length work on tracing quotations, which I bought years ago, see The Quote Sleuth.
(I have checked the preceding edition)
to see if that is a genuine Einstein quotation? In the English-speaking world, Einstein is second only to Mark Twain in having sayings attributed to him that he never said.
Of all persons to whom pithy lines are attributed, Mark Twain is by far the most likely to NOT be the genuine attribution.
I have never been able to verify that Twain wrote the usually quoted form of that line, "I have never let my schooling interfere with my education." (There are a lot of scholars who study such things.) I have seen one attribution of that line to Canadian humorist Stephen Leacock,
which to me is a much more believable attribution, but one I am also unable to verify.
Mark Twain did have some great lines about schools, of which my favorite is
"In the first place God made idiots. This was for practice. Then He made School Boards."
-- Mark Twain, Following the Equator (1903) 2:295
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