“The buddha nature, or tathagatagarbha, is present in all beings, but is hidden by obscurations, in the same way that buried gold is hidden by the earth under which it lies. As you listen to, reflect, and meditate on the Dharma, all the inherent qualities of your buddha nature will be actualized.”

"Shoaku makusa : Not Doing Wrong Action" http://wwzc.org/dharma-text/shoaku-makusa-not-doing-wrong-action as translated by Anzan Hoshin roshi and Yasuda Joshu Dainen roshi (2007)

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

Pearls of Wisdom

Source: Buddha Book

As quoted in Eihei Dogen, Mystical Realist (2004) by Hee-jin Kim

As quoted in Teachings of the Buddha p. 207

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.

Being Peace (2005)
Context: Children understand very well that in each woman, in each man, in each child, there is capacity of waking up, of understanding, and of loving. Many children have told me that they cannot show me anyone who does not have this capacity. Some people allow it to develop, and some do not, but everyone has it. This capacity of waking up, of being aware of what is going on in your feelings, in your body, in your perceptions, in the world, is called Buddha nature, the capacity of understanding and loving. Smiling is very important. If we are not able to smile, then the world will not have peace. It is not by going out for a demonstration against nuclear missiles that we can bring about peace. It is with our capacity of smiling, breathing, and being peace that we can make peace.