Zazen is an activity that is an extension of the universe. Zazen is not the life of an individual, it's the universe that's breathing.
DogenThat the self advances and confirms the ten thousand things is called delusion; that the ten thousand things advance and confirm the self is called enlightenment.
DogenIn the assemblies of the enlightened ones there have been many cases of mastering the Way bringing forth the heart of plants and trees; this is what awakening the mind for enlightenment is like. The fifth patriarch of Zen was once a pine-planting wayfarer; Rinzai worked on planting cedars and pines on Mount Obaku. . . . Working with plants, trees, fences and walls, if they practice sincerely they will attain enlightenment.
Dogen