Tai chi secrets
It’s a secret.
I could tell you. But then I’d have to
kill you explain it to you.
Esoterica in this case does not really refer to secrets that are deliberately kept from students, although there is a history of that.
These are the types of secrets that teachers tell their students all the time, or tell them as soon as there is a chance that they might understand. It just takes the student a long time and a few epiphanies to become aware of the meaning.
Student (after 10 years of training): “Sifu, why didn’t you ever tell me that I should relax my shoulders?”