This quote emphasizes the varying approaches to learning and the attitudes of different individuals. Smart people possess the humility and open-mindedness to learn from any source, whether it be books, mentors, or even everyday experiences. They are receptive to new ideas and insights from everyone around them, recognizing that knowledge can be found in unexpected places.
On the other hand, average people tend to rely mainly on their personal experiences to gather knowledge. While this can be valuable, it may limit their understanding and growth compared to those who actively seek wisdom from a wide range of sources.
Stupid people, in contrast, exhibit arrogance and closed-mindedness, believing they already possess all the answers. Their unwillingness to learn from others or even their own experiences hinders their intellectual development and personal growth. In essence, the quote highlights the importance of remaining humble, curious, and receptive to continuous learning in order to become wiser individuals.