‘The sages and ancient Buddhas all had prescriptions for practice and realization. To those who were trapped in the notion of existence, they gave the medicine of nonexistence; to those who were trapped in the notion of nonexistence, they gave the medicine of existence. They measured out eighty-four thousand medicines to treat the eighty-four thousand illnesses of ordinary mortals, but Ummon’s prescription today is special. If the whole earth is medicine, what illness does it cure? Where is your self? Right at this very moment, what is this? It is all medicine! Naturally complete without cultivation, what practice or realization would you talk about?’ (Commentary on the Blue Cliff Record)
You could boil this, and indeed all teachings, down to, ‘Right at this very moment, what is this?’ Or look back to what Dogen suggested yesterday. Medicine everywhere.