Of four lessos in this book , only the second is interesting and readable for me ,in which Moustafa explains roughly and briefly demonstrating the basic structure of human nature as the exchange of Language(as the thirdness capable of uniting the pairs) by setting out the notions of sociologists such as Durkheim ,Mercel Mauss , LeviStrauss in order to lead the readers to the concepts of Lacan about Language ,the Other, etc.But the rest of the book are in my opinion unclear in explaining the theories of Freud and Lacan about the Phallus, Symbolic Castration ,Paternal metaphor ,the name of the father ,etc and some of them are different with what I've already understood about them.This last one makes me panic.