A Reminder

I remind you that the One Point (Seika no itten) located in the lower abdomen below the navel at a distance of the thickness of three of your fingers: index, middle, and ring.

A Question

Zen practitioners know that self is just a total denial. They also know that every negation eventually turns into affirmation. What is this affirmation then?

When I started to practice Zen, I had problems with sitting meditation due to post traumatic stress disorder (PTSD) that I had

When I started to practice Zen, it was difficult for me to concentrate sitting in a static body posture due to post traumatic stress disorder (PTSD) that I had. Then I found these books by Koichi Tohei: Ki in Daily Life; The Book of Ki, How to Unify Ki.

In a nutshell, he has four basic principles of unification of mind and body:
1. Keep One Point it's about 2-4 inches below the navel (although if he know physics, he would 've known that every point of space can really be considered as a center of the univ…erse because of its geometry)
2. Relax Completely
3. Keep weight underside
4. Extend Ki

You can even find something on the internet if you google up "koichi tohei one point", for example. I've just found:
[PDF]Ki Breathing by Koichi Tohei Sensei
http://www.wheatbeltaikido.com/DojoDocuments/KiBreathing.pdf

But having neurosis, I wasn't always able to find and keep the One Point; therefore, I had to invent my own method.