The challenge in learning SD (or any discipline) and the greatest obstacle is not "what you know you don't know", but "what you don't know you don't know". It is really easy to get to a sense of certainty as your knowledge of a particular domain begins to grow. When you are a master of the hammer, there can be a tendency to want to use it to pound in screws and rivets as well. It is difficult to see how much of the iceberg is still below the surface while you are focusing on the visible.
Being too sure of what you think you know can be dangerous (it is intuitively obvious that the world is flat after all). It has definitely had me tilting at windmills more than once (along with people much smarter than I am). Remember that seeing or hearing something doesn't make it true.
So I recommend that you question what you think you know, and reflect early and often on what you see and hear from others. Children learn faster than adults because they have less certainty and more curiosity. On the road to mastery, a mood of childlike awe and wonder will carry you along much further and faster than one of certainty.
jaybob413 for VILLAGE ELDER !!!!
I love your zenlike posts and the nice comparisons you make. Awesome. I love you.