“It says in the sutras that buddha nature pervades all beings. But this does not mean that there is some thing which is buddha nature. Rather, when all the confusion of samsara is cleared away, what remains is buddha nature.”

Source: Echoes from the Bottomless Well (1985), p. 103

The Heart of Compassion (2006)

Source: Echoes from the Bottomless Well (1985), p. 120
Context: "Nothing burns in hell but ego" says Tauler.
Does anything live but Buddha Nature, Christ Spirit?

As quoted in Teachings of the Buddha p. 207

Fearless Death: Buddhist Wisdom on the Art of Dying (2012)

Source: The Zen Teachings of Huang Po (1958), p. 29
Context: All the Buddhas and all sentient beings are nothing but the One Mind, beside which nothing exists. This Mind, which is without beginning, is unborn and indestructible. It is not green nor yellow, and has neither form nor appearance. It does not belong to the categories of things which exist or do not exist, nor can it be thought of in terms of new or old. It is neither long nor short, big nor small, for it transcends all limits, measure, names, traces and comparisons. It is that which you see before you - begin to reason about it and you at once fall into error. It is like the boundless void which cannot be fathomed or measured. The One Mind alone is the Buddha, and there is no distinction between the Buddha and sentient things, but that sentient beings are attached to forms and so seek externally for Buddhahood. By their very seeking they lose it, for that is using the Buddha to seek for the Buddha and using mind to grasp Mind. Even though they do their utmost for a full aeon, they will not be able to attain it. They do not know that, if they put a stop to conceptual thought and forget their anxiety, the Buddha will appear before them, for this Mind is the Buddha and the Buddha is all living beings. It is not the less for being manifested in ordinary beings, nor is it greater for being manifest in the Buddhas.

Source: Buddha Book

When Things Fall Apart: Heart Advice for Difficult Times (1997)

Source: Book of Ki (1976), p. 106
Context: Countless people have attempted to define the absolute power of the world of nature. Some praise it as God, some call it the Buddha, others call it truth. Still others convert nature into a philosophy by which they attempt to sound its deepest truth. Such attempts to define the power of nature are no more than striving to escape its effects.
All of the forces of science have been unable to conquer nature because it is too mystic, too vast, too mighty. It intensely pervades everything around us. Like the fish that, though in the water, is unaware of the water, we are so thoroughly engulfed in the blessings of nature that we tend to forget its very existence.