Ecclesiastes 1:15 (ESV)

15 What is crooked cannot be made straight, and what is lacking cannot be counted.

When as a human being one never looks beyond earthly wisdom, then at some point one will have to recognize that it is impossible to straighten that which is crooked. People will then come to the realization that, through their human wisdom, they can never create a perfect world. People cannot always make up for what is missing, regardless of how much they try. There will always be shortcomings.