In this section of Bendowa, Master Dogen is using some powerful images to describe a kind of chain reaction brought about by Zazen ...
The "non-self" fulfilling prophesy is realized!
In other words, we first deemed and tasted that a moment of sitting Zazen is the Buddha herself acting perfectly Buddha-like right there ... that the very sitting of Zazen --is-- all the world right, just the way it should be ...
Then, by seeing all things as such, we allowed the mind to quiet, dropping thoughts and divisions ... whereby all the world is rendered quiet and whole.
Then, we rose from the cushion to live with that view, perhaps to help others via the wisdom of Buddhism ... perhaps to fix some wrongs in this world and make them right, and to teach the Buddha's wisdom to others so that they may know that same quiet and wholeness.
... thereby working to make the world right, even as we see it is alright.
... bringing peace and realization to others, even as we taste peace and realization.
... sensing that the whole world, every blade of grass and stone and grain of sand, is part of the game too.
These balanced and right states of realization also work the other way, following paths of intimate and mystical cooperation, so that this person who sits in Zazen steadfastly gets free of body and mind, cuts away miscellaneous impure views and thoughts [accumulated] from the past, and thus experiences and understands the natural and pure Buddha-Dharma. Throughout each of the infinitesimal, innumerable seats of truth of the buddha-tathagatas, [the practitioner] promotes the Buddha's work and spreads its influence far and wide over those who have the ascendant makings of a buddha, thus vividly uplifting the ascendant real state of buddha. At this time, everything in the universe in ten directions - soil, earth, grass, and trees; fences, walls, tiles, and pebbles - performs the Buddha's work.
From: Bendowa - A Talk about Pursuing the Truth - Nishijima-Cross