This quote was used on the most recent episode of The Skeptics’ Guide to the Universe podcast:
“Education is the path from cocky ignorance to miserable uncertainty.”
I just did a search on the phrase and see this has been quoted many, many times, as it should be. Glad to quote it again. Among other things, it explains why lots of people just don’t want to know any more than they do already. Certainty is comfortable. People who are willing to live on the edge of knowledgeable discomfort are the same people who are likely to save us from our own blunders.