Your mileage may vary, but I immediately thought of Galadriel in the Lord of the Rings trilogy, who states this problem in negative terms. Yes, she’s a made-up character delivering a line in a movie about an imaginary ring from a fantasy book, but anyone who really understands Tolkien’s story will have reflected on the connection between localized morality (the imagined injustice Gollum faces, and the real prejudice he experiences from Sam) and wisdom.
And some things that should not have been forgotten were lost. History became legend. Legend became myth. And for two and a half thousand years, the ring passed out of all knowledge.