What Happens When Mistakes Go Unrepaired

So many possibly interpretations here.

Someone mentioned musical performance.  As a wanna-be classical pianist, one of my downfalls was that I never had the discipline to take the piece’s most difficult passages and spend the necessary amount of time to break them down into their elements and practice them until they became, in fact, the most easily played parts.

Perhaps a more obvious application is politics. If we don’t repair an attempt to overthrow our government, guess what we’re going to repeat?