that the essential substance of mind itself is emptiness.
-- Drikung Kyabgon Chetsang Rinpoche, "The Practice of Mahamudra", published
by Shambhala Publications
-
+~
+ "Like a cloud." This is a simile for how the wisdom mind benefits sentient
+beings without conceptual thought. For example, in the summer, clouds gather
+in the sky without effort, causing crops and so forth to grow perfectly
+through the rain falling on the ground without conceptual thought.
+ Likewise, the activities of the wisdom mind ripen the trainees' crop of
+virtue through the rainfall of Dharma without conceptual thought.
+ -- Gampopa, from "The Jewel Ornament of Liberation: The Wish-fulfilling Gem
+ of the Noble Teachings"