Feeling rhythm

When you practice the form, you find that the movements have a certain duration.

The combination of waist, spine and weight shift lend each movement its own pace and unique character.
A long, sweeping movement could never be delivered using fa jing and a short, abrupt movement would certainly require it.

As your experience grows, you learn the rhythm of the form itself.
You must blend the rhythm of the form with the rhythm of your own body; and the synthesis of the two is your form.