When I hear the word 'expert,' I always imagine someone who has gathered a bunch of information about a particular subject. I picture him or her sitting on their pile of books, dispensing unsolicited advice to any traveler or passerby who is within earshot.
I compare that word to that of the 'specialist.' A specialist is someone who has trained and learned the things he or she wants to become proficient in so that other people will benefit from that time and effort spent honing skills and knowledge.
The expert can tell you how the fire started, but its the specialist that knows how to run into the burning building to save others, because that's what specialists do. The expert can tell you all of the ways to stop the fire, but its the specialist who will actually act on those ways to put it out.
Relying on your vast body of knowledge causes you to run the risk of becoming obsolete. Seeking out new ideas and continually honing your skills to serve others is one sure way to always stay relevant.
Eyes open. Mind even more open. Skills sharp. It's that simple.