The Importance of Being An Expert in Something

Let me ask you a question: "What is the one thing you are expert in?" Can you give me a fast straight forward answer without taking up to 1 minute to think? If you can answer this question in just a matter of seconds, then you confidently know what you are good at. That's good. It doesn't matter if the thing you are expert in is associated with academic or not. It can be sport, science, social science, arts, IT etc. Your expertise can also be the one thing that you love to do...