kirtu wrote:The sitting posture itself is not identical to Buddhahood. Deshimaru didn't mean that literally. However sitting is needed to accomplish zazen (unless one has a handicap , in which case it would be difficult but not impossible). But zazen is practice/enlightenment. From the beginning. In Zen, zazen is the gateway to directly discovering one's Buddhahood for oneself.
As I read it, you say that (1) sitting is required (unless not) for zazen, (2) zazen is practice-enlightenment, (3) zazen leads to the discovery of buddhahood. So, sitting is an ideal preparation for practice-enlightenmet but it's not the same. And although it is called practice-enlightenment, there is a further step to find buddhahood - or you meant probably that practice-enlightenment is buddhahood, or rather the realisation of buddha-nature, but not the same as ultimate enlightenment. That way we have 3 or 4 stages of Zen practice, although if I remember correctly Dogen didn't agree with Dongshan's five ranks. Nevertheless, it is now clarified that sitting itself is not actually liberation but only the first step on the path. Or am I distorting your point?