" By now you may have concluded that the conversation was neither
about Descartes nor about philosophy, although it certainly was
about mind, brain, and body. My friend suggested it should take
place under the Sign of Descartes, since there was no way of approaching
such themes without evoking the emblematic figure who
shaped the most commonly held account of their relationship. At
this point I realized that, in a curious way, the book would be about
Descartes' Error. You will, of course, want to know what the Error
was, but for the moment I am sworn to secrecy. I promise, though,
that it will be revealed. "

― António R. Damásio