人要精明還是聰明呢?

“一把手要英明,二把手要高明,三把手要精明”
I began to feel that been smart has a limited benefit. In a way, it may give you a head start in certain work but in the long run, you may need to have a certain sense of quick wittedness to push your learning level, especially in the industry of design.

Question. How do one develop a quick witted mind?