Full Idea
Socrates: I do not believe that virtue can be taught.
Clarification
'Virtue' here is the Greek word 'areté', which also translates as 'excellence'
Gist of Idea
Socrates did not believe that virtue could be taught
Source
Plato (Protagoras [c.391 BCE], 320b)
Book Reference
Plato: 'Protagoras and Meno', ed/tr. Guthrie,W K C [Penguin 1956], p.51