Full Idea
The only real kind of faring ill is the loss of knowledge.
Gist of Idea
The only real evil is loss of knowledge
Source
Plato (Protagoras [c.391 BCE], 345b)
Book Reference
Plato: 'Complete Works', ed/tr. Cooper,John M. [Hackett 1997], p.776
A Reaction
This must crucially involve the intellectualist view (of Socrates) that virtuos behaviour results from knowledge, and moral wickedness is the result of ignorance. It is hard to see how forgetting a phone number is evil.