Water is fluid, soft, and yielding. But water will wear away rock, which is rigid and cannot yield. As a rule, whatever is fluid, soft, and yielding will overcome whatever is rigid and hard. This is another paradox: what is soft is strong.
The most basic inherent constraint is that neither time nor wisdom are free goods available in unlimited quantity. This means that in social processes, as in economic processes, it is not only impossible to attain perfection but irrational to seek perfection— or even to seek the "best possible" result in each separate instance. ~