How true are these!??!

Gordon Pirie's Laws of Running

1. Running with correct technique (even in prepared bare feet), on any surface, is injury free. 
2. Running equals springing through the air, landing elastically on the forefoot with a flexed knee (thus producing quiet feet). On landing, the foot should be directly below the body. (Walking is landing on the heels with a straight leg). 
3. Any and all additions to the body damage running skill.
4. Quality beats quantity; the speed at which you practice the most will be your best speed.
5. Walking damages running.
6. The correct running tempo for human beings is between three and five steps per second.
7. Arm power is directly proportional to leg power.
8. Good posture is critical to running. (Don't lean forwards!).
9. Speed kills endurance; endurance kills speed.
10. Each individual can only execute one “Program” at any one time; an individual can be identified by his or her idiosyncrasies (i.e. “Program”). An individual can change his or her “Program” only by a determined, educational effort; each individual's “Program” degenerates unless it is controlled constantly. 
11. Static stretching exercises cause injuries!
12. Running equals being out of breath, so breathing through the mouth is obligatory (hence the nickname “Puff Puff Pirie”).