Sokuzan’s dharma talk is inspired but this verse from the poem “Hsin -hsin Ming” by Seng-ts’an, the Third Zen Patriarch:
“When the fundamental nature of things is not recognized, the mind’s essential peace is disturbed to no avail. The Way is perfect, as vast space is perfect, where nothing is lacking and nothing is in excess.”
https://www.youtube.com/watch?v=1wcrZ7bEjCw&t=2s