The task we set ourselves, in this thesis, is to examine the variousconceptions of the Republic s Book X. In this research, exposing controversies about the true content of Book X, no less than twenty-five interpreters willappear as people who, at some point in their own trajectories, were forced to thinkabout Book X as a work that is about: (1) platonic mysticism; (2) asclepiadmedicine, from which Socrates appears as capable of healing the city, a cure that can be thought of as philosophy itself; and/or (3) a poetics called platonic. Havingseen the conflicto that ruins with the city s rational element (logistikon, R.X.,605b5) and, by analogy, that conceives the soul s diagnosis in the Republic s Book X, we wanted to make our defense of Book X as being about soul possible.This study defends the soul s tripartite character as the remedy (pharmakon) forthe city, which, by analogy, with the sick soul, would need an orthodoxy. In the search for this orthodoxy in Book X, we re-discover the danger, each time reiterated by Socrates, of bipartition assaulting the city. The method of getting out of this danger and finding rest, as we want to maintain, involves the thesis of thesoul s tripartition. Thinking about the part of the soul to what the poets seem tolook forward as the part that needs to be cured is already an important task of research in the Contemporary Academy. We, here, rely on Ivana Costa andThomas Robinson s work to investigate among the three parts of the soul, whichis named alogistikon in Book X. These interpreters deduce that this part of thesoul must be the same as that one referred to in Books IV and IX by the termepithymetikon. Finding out if this is really the part of the soul that needs to behealed is part of our investigation.