Rolf Dobelli on the limits of expertise and value of expanding our circle of competence

If you take your problem to an expert, don't expect the overall best solution. Expect an approach than can be solved with the expert's tool kit.  The brain is not a central computer.  Rather, it is a Swiss Army knife with many specialized tools.  Unfortunately, our "pocketknives" are incomplete.  Given our life experiences and our professional expertise, we must try to add two or three additional tools to our repertoire - mental models that are far afield from our areas of expertise.  For example, over the past few years, I have begun to take a biological view of the world and have won a new understanding of complex systems.  Locate your shortcomings and find suitable knowledge and methodologies to balance them.  It takes about a year to internalize the most important ideas of a new field, and it's worth it: Your pocketknife will be bigger and more versatile, and your thoughts sharper.

~ Rolf Dobelli, The Art of Thinking Clearly, p. 277