Thus spoke Guru Rinpoche Padmasambhava (པདྨ་འབྱུང་གནས་):

It is the single (nature of) Mind [≈ prabhāsa] which encompasses all of Samsara and Nirvana.
Even though its inherent nature has existed from the very beginning, you have not recognized it [being attached to the corporeal outer garment].
Even though its clarity and presence has been uninterrupted, you have not yet encountered its face.
Even though its arising has nowhere been obstructed [since the beginning of time], still you have not comprehended it.
Brackets are mine.