An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

Summary

This quote implies that an expert is someone who specializes in a particular field or topic, gradually acquiring deep knowledge and understanding. However, as their focus narrows, their expertise may become so specific that it loses relevance or practicality in the broader context. Eventually, the expert may reach a point where their knowledge is so specialized that it becomes irrelevant or meaningless in the grand scheme of things. Ultimately, this quote suggests that too much specialization can lead to a lack of broader perspective or practical application.