Sokuzan’s dharma talk is inspired by verse three in Vasubandhu 's “The Teaching of the Three Own-Beings” (Tri-svabhava-nirdesa), here as translated by Stefan Anacker:

The constant state-of-not-being-found of “how it appears” in that which appears, can be known as the fulfilled own-being, because of its state of non-otherness.

https://www.youtube.com/watch?v=J23YaIuEpxM