Dilgo Khyentse Rinpoche says : “Whenever clouds gather, the nature of the sky is not corrupted, and when they disperse, it is not ameliorated. The sky does not become less or more vast. It does not change. It is the same with the nature of mind: it is not spoiled by the arrival of thoughts; nor improved by their disappearance. The nature of the mind is emptiness; its expression is clarity. These two aspects are essentially one’s simple images designed to indicate the diverse modalities of the mind. It would be useless to attach oneself in turn to the notion of emptiness , and then to that of clarity, as if they were independent entities. The ultimate nature of mind is beyond all concepts, all definition and all fragmentation.”