What is another word for knowing yourself

Bonus question: according to wikipedia, in chinese philosophy yin and yang "describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent." what are some examples from the story that amy tan may have intentionally incorporated elements of yin and yang philosophy into this story? select 2.

How the environment of the northeast region affects the lifestyle of the people that live there

Which powers best complete this graphic?