I had always insisted that a good education was a synthesis of book learning and involvement in social action, that each enriched the other. I wanted my students to know that the accumulation of knowledge, while fascinating in itself, is not sufficient as long as so many people in the world have no opportunity to experience that fascination.
You can be an expert any field of study with consistent effort and consistent learning.
Right now I'm thinking a good deal about emancipation. One of our sins was slavery, another was emancipation. It's a paradox. In theory, emancipation was one of the glories of our democracy - and it was. But the way it was done led to tragedy, turning four million people loose with no jobs or trades or learning. And then in 1877 for a few electoral votes, just abandoning them entirely. A huge amount of pain and trouble resulted. Everybody in America is still paying for it.