Quote by P. J. Plauger
My definition of an expert in any field is a person who knows enough about what's really going on to be scared.

Summary
This quote suggests that being an expert in a particular field goes beyond mere knowledge or expertise, but encompasses a deep understanding of the complexities and nuances involved. An expert is someone who possesses insider knowledge, and as a result, they comprehend the potential risks, uncertainties, and challenges inherent within their field. This understanding creates a sense of caution or apprehension, emphasizing that true experts comprehend the depth and gravity of the subject matter, prompting a level of humility and respect for the complexity of their domain.