Within the all-pervasive expanse of the sky of great emptiness, without center or circumference, the shadowless sun of luminosity naturally arises, without emanating or dissolving, thus the dense darkness of innate and conceptual ignorance simultaneously vanishes, and the gateway of the great illumination of clear primordial wisdom freely opens, which is the vast expanse of the original primordial ground, free from restrictions and partiality.

-- Lama Tharchin Rinpoche