"It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so"

This quote by Mark Twain is a reminder that knowledge is not constantly absolute. It is easy to think that we understand something for certain, but it is important to remember that our understanding of the world is restricted. We can make errors when we assume that our understanding is infallible. It is important to remain open-minded and to question our own beliefs. We must be willing to accept that we may be wrong which our understanding of the world may be insufficient. This quote functions as a suggestion to be modest and to acknowledge that our understanding is restricted. It is important to stay open up to new ideas and to be happy to change our beliefs when provided with new evidence.