What gets us into trouble is not what we don't know. It's what we know for sure that just ain't so.

Summary

This quote, often attributed to Mark Twain, highlights the dangers of overconfidence in our knowledge. It suggests that it is not the lack of knowledge that causes problems, but rather the certainty in beliefs or information that is incorrect. It reminds us to be cautious and open-minded, as thinking we know something definite when it is actually untrue can have detrimental consequences. The quote encourages intellectual humility and the need to constantly question and verify our beliefs in order to avoid potential trouble.