all 18 chapters face in 18 directions.
I disagree. The main direction is Krishna Conciousness and turning from a material way of thinking. As was the case with Arjuna in the very 1st chapter. He was troubled, forgot, and therefore thought as the material wo/man thought. Then he shows us that is we take Krishna as our teacher, let him guide our chariot, then we can be guided.
Arjuna said: My dear Krishna, O infallible one, illusion is now gone, I have regained my memory by Your mercy. I am now firm and free from doubt and am prepared to act according to Your instructions. [bVG 18:73]
Because you doubt the scripture you are sure not to understand it [bVG 4:40].