I've been watching all the precedent videos understanding most of what happens, but I always found that I had no link between what I saw and what I know already. I could not integrate the new set of concepts to my current knowledge. It was quite puzzling. Now with the first 18 mins of this lecture everything just clicked. It's like I was floating in space having a hard time navigating but still could move from one point to another. Now I got gravity. This is quite impressive.####[['lecture', 'Course_General_Feedback', 'POS']]