Great! Your 卦理 has great progress.

Using another point of view to discuss something, may get surprise.

The first , The mountain is a mountain. 　　
The second, The mountain is not a mountain.
The third, The mountain is a mountain. 　
(I try to write down the saying in English. )

Maybe I ever being a abecedarin in teaching 卦理 for you．
But, now you can get it in your hand by yourself. Great! Just I want.

(Deniseyang told me try to express my thinking in using English.
Getting chance to practice.)

Give my best wishes for you.