Scott Carson on 'The Examined Life'

In other passages in other dialogues Socrates (that is, Plato, using Socrates) draws a distinction between two kinds of ignorance. One kind is the straightforward ignorance of objective facts for which no one can be held morally blameworthy unless they claim to know something that they know full well they don't know. But the other kind, which Plato appears to have regarded as a moral failing, is ignorance of the fact that one is ignorant--a kind of ignorance of one's own limitations with regard to expertise. Although Socrates always professed to be ignorant in the first sense, he admitted that he did not believe himself to be ignorant in the second sense--the sense that, for Plato, was far more important. It was precisely because Plato regarded Socrates as wise in this latter sense that he regarded Socrates as the paradigm case of a wise person.

If it accomplishes nothing else, philosophy will teach you about your own limitations, even as it illumines the limitations of others. You come to understand very quickly that, not only is there no such thing as progess in philosophy, but there is not really any such thing as progress at all, other than the banal sort that allows us to build better bridges or manufacture better textiles, machinery, and medicines. We are more technologically advanced today than the ancient Greeks were, but morally, psychologically, philosophically--in any really important sense, we are no further than they. In some ways, I imagine, we have yet to catch up with them.

Scott Carson, The Examined Life.