I realize I've been pitting these two thinkers against each other here constantly, but only to, in the end, constantly elaborate the Derridian criticism of Lacan and not the other way around. This is not due to any prejudices I have against Lacan and in favor of Derrida (though I do have some against Lacanians) so much as it is my taking longer to come to grips with the scope of Derrida's project. But now, I think, I'm in a position to let Lacan have his word, if only because I feel that I can let his voice criticize Derrida without reducing Derrida to what he is not (as is so commonly and easily done).
When I began to teach something about Psychoanalysis I lost some of my audience, because I had perceived long before then the simple fact that if you open a book of Freud, and particularly those books which are properly about the unconscious, you can be absolutely sure — it is not a probability but a certitude — to fall on a page where it is not only a question of words — naturally in a book there are always words many printed words — but words which are the object through which one seeks for a way to handle the unconscious. Not even the meaning of the words, but words in their flesh, in their material aspect (from Lacan.com).