In 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.
DogenZazen 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.
DogenContinuous practice, day after day, is the most appropriate way of expressing gratitude. This means that you practice continuously, without wasting a single day of your life, without using it for your own sake. Why is it so? Your life is a fortunate outcome of the continuous practice of the past. You should express your gratitude immediately.
Dogen