“Thinking that practice and enlightenment are not one is no more than a view that is outside the Way. In buddha-dharma, practice and enlightenment are one and the same. Because it is the practice of enlightenment, a beginner’s wholehearted practice of the Way is exactly the totality of original enlightenment. For this reason, in conveying the essential attitude for practice, it is taught not to wait for enlightenment outside practice.
Therefore, the very impermanency of grass and tree, thicket and forest is the Buddha nature. The very impermanency of men and things, body and mind, is the Buddha nature. Nature and lands, mountains and rivers, are impermanent because they are the Buddha nature. Supreme and complete enlightenment, because it is impermanent, is the Buddha nature.”
~ Dōgen Zenji