Full Idea
It is wisdom that makes possible courage and self-control and integrity or, in a word, true goodness.
Gist of Idea
Wisdom makes virtue and true goodness possible
Source
Plato (Phaedo [c.374 BCE], 069b)
Book Reference
Plato: 'The Last Days of Socrates', ed/tr. Tredennick,Hugh [Penguin 1969], p.115
A Reaction
Aristotle also says that prudence (phronesis) makes virtue possible.