This chapter argues that Plato effectively pre-empts the Stoics in defining virtuous action as conformity with cosmic order. Scholarship has been beguiled by Alcibiades’ striking analysis of Socrates in the Symposium as someone ugly to look at but beautiful within, and misled into thinking that Plato defines virtue as ‘inner beauty’, something private which only accidentally manifests itself in public benefit. In fact, as a closer examination of Diotima’s account of the lover’s ascent towards beauty in the same dialogue shows that the distinction that actually interests Plato is that between the body and its activity – not the body and the soul as such. And by referencing this activity to cosmic order (as he does most clearly in Gorgias 507e-508), Plato guarantees essentially that virtue is not only publicly manifest but of essential benefit to others as well as self.