/lit/ - Literature

Hey /lit/, I have a simple question. I remember hearing or reading from somewhere a quote that went like this:

"Careful! If you keep writing, you'll stop using your memory!"

It's a play on how new media is often misunderstood. A very similar line is used in "Understanding Comics" although I'm sure McCloud took it from somewhere else. Does anyone know, more or less, where this first came from? Or at least something that can be quoted? Thank you very much in advance.

Pic isn't necessarily related.