Someone who truly understands what they are talking about from bottom to top and can fit the information into a larger worldview without introducing game breaki

Someone who truly understands what they are talking about from bottom to top and can fit the information into a larger worldview without introducing game breaking conflicts all over the place. Someone who stakes a claim on the value of what they teach and personally self correct when flaws are found. He or she can debate the merits or justify the work being taught. The same person burns a path or spends the time to make somebody be taught something important and valuable.