What is Funder’s First Law and what is an example?

Funder’s First Law states that "Great strengths are usually great weaknesses, and surprisingly often, the opposite is true as well."
Take the example of someone who is a perfectionist. Their great strength lies in their attention to detail—when writing a paper, no aspect of the subject under discussion is overlooked or minimized. They are thorough to the point of obsession. The formatting is just right, with not a single comma misplaced. Of course, this level of scrutiny may lead to papers that are overly long, unfocused, or possibly handed in late. Someone who is more slapdash, on the other hand, might hand in a paper in which the research is a little skimpier and typos are prevalent—but the paper at least is handed in on time.
The rule can be applied to both individuals and institutions. Let us imagine a charitable organization that spends all its time distributing money to the needy. This is laudable, but an audit reveals careless or absent bookkeeping, and its nonprofit status is pulled. Another organization with the same mandate may devote a significant portion of the gifts it receives to administrative overhead. It distributes less money but can account for it all, and therefore it is around for a considerably longer time.