I rest my case.

What is missing in most martial systems today?

'... Jin is useless without shen or spirit. You could argue that standing has a definite spiritual development aspect, but one of the ways this is different from many others is to illustrate some exercises that play a definite role in developing fighting spirit.

The Three Treasures of life - Jing (life essence), Chi (energy) and Shen (Spirit) - are the basic components which make us "what we are". Although we cannot have an elevated strong spirit without sufficient Jing and Chi,

Shen or Spirit is the most important component of fighting success.

3 TREASURES OF LIFE

Li (Muscle Strength)
<--->
Jing (Life Essence)

Chi (Energy)
<--->
Chi (Energy)
<--->
Shen (Spirit)

The Three Treasures are the necessary components for life. Kung Fu is a way of life. It is also about fighting. Real fighting has nothing to do with competition and pretty forms, etc. Real fighting must be understood as "to the end". It is vicious, merciless and usually over very quickly.

Without shen the spirit, there is no Jin, all training is useless, the Ten Foundations quickly disappear.

Shen or Spirit is the most important component for fighting success. Shen or Spirit is the most important component for fighting success.