Van Der Linden’s idea is that errors have consequences, but, contrary to what most people think, not all of the consequences are negative. Although it’s possible, and even likely, that making an error has a negative consequence, it’s also likely that the error has a positive or a neutral outcome.

https://www.blog.theteamw.com/2011/03/10/100-things-you-should-know-about-people-77-not-all-mistakes-are-bad-2/