Abstract
This article aims to clarify the meaning of henology for Lacan and Žižek. Žižek apparently rejects Neoplatonic way of thinking, but by considering Lacanian Henology through its origin, Etienne Gilson, Lacanian henology and Žižek’s Hegelian reading of the One become converged. Both of them think the movement of the One from one principle and its two aspects. The principle is that the One gives something that it does not have, and it corresponds to Lacanian definition of love. Regarding its two aspects, the first one is the logical necessity that generates necessarily the One, and the second is the logical contingency that generates contingently the surplus element. By this, we can clarify the theoretical development of each period of Lacan. In early Lacan, henology was a logic that ties his “the Symbolic” and Freudian Death drive. In middle Lacan, his main concern was the mathematical logic as the logic of the Id, and henology became the generative logic of the subject of enunciation or the subject of the jouissance. But at the same time, this movement produces as a co-product a inassimilable remainder, “object a” with the subject of signifiant. In late Lacan, by virtue of the “necessary” movement of the One and its “contingent” co-product, the universe of the discourse became indeterminate, undecidable, “not-all,” which means for Lacan “the contingent.” This characteristic became the logic of Lacanian “sexuation.”