"What lessons can human beings learn by understanding that there are limits to how much we can ultimately know?"

When I think of the word "limit", I think of a capacity. And in this case it is a capacity of information we already know. Weather it be in philosophy, physics,mathematics etc. its a limit because its only what we know for now. In time, just like our ancestors have done before we will know more and have more answers and questions that are greater then the ones we have now. Or even answers to the questions we have now, in time. We came this far over many years, and in many years from now we will be further with the limit of knowledge we have.