“With language we bark at this thing, and what S (A barred) means is that it [ça] does not respond. That is why we talk all alone (…) until what we call an Ego emerges, that is, something for which there is no guarantee that it cannot, strictly speaking, become delusional. That is why I pointed out (…) that between madness and mental debility we have but the choice.”
“The Seminar of Jacques Lacan, Book XXIV: L’insu que sait de l’Une-bévue s’aile à mourre,” lesson of 11 January 1977, Unpublished.