Excerpt from "Lamp of Mahamudra" by Tsele Natsok Rangdrol:
"Section One - Ground Mahamudra"
"The View"
"Your natural essence cannot be established as either samsara or nirvana. Not confined by any one extreme, free from the limitations of exaggeration or denigration, it is not tainted nor spoiled by such designations as pleasant or unpleasant, being or not being, existent or non-existent, permanent or annihilated, self or other, and so forth...
Yet, no matter how it manifests, ultimately this essence has no true existence...
It is the actual basis of all that appears and exists, the whole of samsara and nirvana.
When you realize its nature, knowing its real condition, you are called a Buddha. When you do not realize it, remaining ignorant of it and experiencing confusion, you are called a sentient being."
For any who are interested, "Lamp of Mahamudra" and "The Heart of the Matter", both by Tsele Natsok Rangdrol, have been combined in a single book, entitled "Heart Lamp", translated by Erik Pema Kunsang, Rangjung Yeshe Publications, North Atlantic Books.