The routines are incredibly difficult to learn and few either qualify or have the strength to learn Tai Chi Kung-Fu.

9 seconds sound clip from the Born Invincible (1978) movie soundboard.

You can hear this line at 00:00:56 in the DVD version of the movie.

Quote context

[...]

- Anyone who wishes to learn it must devote its life to and must start as a child, preferably at the age of eight.

- It must bathe in the secret lotions, take the special pills and hold to a rigorous diet for 30 years

- The Earth's fundamental forces are tapped via the eight octograms.

- The whole body is in balance.

- A change in emphasis in one part of the body will affect a comforting change in another part.

- The routines are incredibly difficult to learn and few either qualify or have the strength to learn Tai Chi Kung-Fu.

- The first steps are to concentrate all energy in the head, the light of the body.

- Out of that, more weight is concentrated in the feet. Promotes stability.

- Finally, all parts of the body are coordinated and fused so that it acts like a single and complex muscle.

- The result is fantastic strength and control.

[...]