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I came across a saying attributed to Heraclitus that could be paraphrased:
"Conceptual thinking is a kind of sacred disease, like epilepsy."
[Diogenes Laertius *Lives of the Eminent Philosophers,* bk 9]
"Sacred disease" was a Greek way of referring to epilepsy; so I've used both terms here.
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I happen to have (very mild) epilepsy. And I've reflected on it in a book I'm writing on contemplative practice and meditation. The book is written in the form of a letter to my young adult daughter.
I wasn't acquainted with that saying attributed to Heraclitus when I wrote this, but it fits...