Play

Self-consciousness ruins your taijiquan.
Ridding yourself of this crippling habit rests at the heart of all spiritual training.
The solution is to play.

Freedom of expression is vital.
Your body and mind must be agile, nimble and mobile.
To be skilled with neigong, you must have a lightness of spirit.

The way of the monkey is a good way to understand what this means in terms of neijiaquan practice.