Perception that there is nothing to perceive -- that is Nirvana, also known as deliverance. How can there be perception when we are confronted by nothing at all? We go on perceiving whether objects are present or not. Hui-haiWhen I behold and am in that Good, I remember nothing of the humanity of Christ, of God inasmuch as he was man, nor of aught else that had shape or form; and albeing I seem to see nothing, yet do I see all things. Angela of Foligno
The Master said to me: 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. Huang Po.
Note well, this one alone is lacking in every mode and quality. Meister Eckhart