Full Idea
Knowledge of what is and is not to be feared is courage.
Gist of Idea
Courage is knowing what should or shouldn't be feared
Source
Plato (Protagoras [c.391 BCE], 360d)
Book Reference
Plato: 'Protagoras and Meno', ed/tr. Guthrie,W K C [Penguin 1956], p.98