To quote Trungpa Rinpoche's words: "the Genuine Heart of Sadness" -- that open, raw and tender part of our heart that is touched by our experience. Ani Pema Chodron said that remaining in touch with this tender, vulnerable feeling is what keeps us from becoming thick-skinned and closed-down to our experience. Staying awake and present with whatever arises creates the space for enlightened qualities of mind to manifest, such as compassion and loving-kindness. (See Gampo Abbey Blog.)
This work, sumi ink on acid-free card board, the size is 10 by 15 inches.