evidence: As Slate pointed out this morning, Williamson is the author of a quote often misattributed to the late South African activist and political leader, which begins: "Our deepest fear is not that we are inadequate. It's unclear exactly when the first time the text was incorrectly ascribed, but it is the kind of pithy motivational language that just proliferates on social media platforms like Pinterest, so once one person said it was by Mandela, that just spread like wildfire. Snopes, the internet fact-checking site, confirms that Williamson, not Mandela, wrote those words in her 1992 book A Return to Love: Reflections on the Principles of a Course in Miracles.