How to close the July (and August) of Jacques Lacan? I can offer no better than the last essay of his Écrits: Science and Truth. In it Lacan stresses the need for science and structuralist philosophy, which separate subjects from objects, as the only reliable means to truth.
Simply put, structuralist science discards humanism, its perpetual blind spots and limitations. Chief among these flaws is the unspoken but very Platonic natural relationship between subjects and knowledge. In the field of psychoanalysis, Lacan targets Jung and his transcendent universe of psychological archetypes. Theories like Jung’s make subjects inappropriately assume that the subject has an essence and makes the subject incorrectly responsible for their own content. These theories ignore the multitude of forces which determine subjects and subjectivity and, in doing so, submit to them.
Structuralists all study some sort of world of “apparatus” whose operations exceed subjectivity. Lacan talks at length about his philosophical kinship with anthropologist Lévi-Strauss, seeing his psychoanalytic work as a partner theory. This kinship comes from Lacan and Levi-Strauss’ common focus on subjects as part of immortal, autonomous structures (language and kinship groups respectively) which determine the subject according to their own rules. Since humans cannot create “metalanguage” free of these structural powers, truth must be found obliquely through ordinary speech.
While Lacanian psychoanalysis studies meaning, it stays faithfully anti-humanist and unconcerned with meaning for its own sake. What psychoanalysis must study to become scientific is not object a, the thing which is desired and which causes desire, but rather the function of object a: what makes object a play the role it does in organizing the subject’s psychology. A scientific psychoanalysis cannot stop with what desire and desired things mean to subjects. It needs to go beyond the human to find what shapes and causes desire.