"The definition of insanity is doing the same thing over and over and expecting different results."
I've heard ed reformers and educators pushing change and innovation use this quote many times, and attributing to Albert Einstein. I honestly have to admit I might have done so myself. The truth is, there's no solid evidence he ever said it. It's not in any of his writings or interviews. It may be just made up.
In his book, Head in the Cloud: Why Knowing Things Still Matters When Facts Are So Easy to Look Up, William Poundstone calls this "Churchillian Drift." That's when a quotation by the marginally famous gets attributed to someone famous, like Winston Churchill. Turns out, Einstein probably didn't say it. Just Google the quote and you'll see the dispute.
The truth, at least for me, is clear: even if we really believe in what we're peddling, we still need to get our quotes right.
"It may sound good at the time, he who gets one or two of his quotes wrong, or facts, can't be trusted to be speaking all the truth."
You can quote on that, at least until someone else says it better!
By the way, Poundstone's book, Head in the Cloud: Why Knowing Things Still Matters When Facts Are So Easy to Look Up is a fascinating read. Highly recommend it. Probably even will convince you to stop using those quote sites for quick quotes to add to your presentations.