Thomas Cleary, ed. & trans., Zen and the Art of Insight (Shambhala Dragon Edition) (Boston & London: Shambhala, 1999) ("'How do you know?' What does this mean...to you? Does it mean 'How do you know?' or 'How do you know?' Or does it mean 'How do you know?'" Id. at vii. "If we take the time to ask ourselves, 'How do you know?'--as a retort, as a question, as a challenge--we may get at the pivot of our relationships with our own thoughts and feelings, with our fellow human beings, and with the world at large. Taken for what it can yield in these roles, the question contains within it a challenge to the root of all ignorance and complacency." Id. at vii. "The four points of mindfulness are a contemplative exercise for detaching fixations of attention; they consist of mindfulness of the body as impure, mindfulness of sensation as irritating, mindfulness of the inconstancy of mind, and mindfulness of phenomena as having no inherent identity." Id. at 31. "'When I search for my mind, I cannot find it.'" Id. at 83. "You can tell you're not applying insight when you think you are practicing it or when you think your thoughts are insights." Id. at 137. "A Zen proverb says, 'Even though gold dust is precious, when stuck in the eyes it obstructs vision.'" Id. at 148.).
Thich Nhat Hanh, The Understanding Heart: Commentaries on the Prajnaparmita Heart Sutra, edited by Peter Levitt (Berkeley, CA: Parallax Press, 1988) ("Penetration means to enter something, not just to stand outside it. When we want to understand something, we cannot just stand outside and observe it. We have to enter deeply into it and be one with it in order to really understand. If we want to understand a person, we have to feel their feelings, suffer their sufferings, and enjoy their joy. Penetration is an excellent word. The word 'comprehend' is is made up of the Latin root com, which means 'together in mind,' and prehendre, which means 'to grasp it or pick it up.' To comprehend something means to pick it up and be one with it. There is no other way to understand something." Id. at 11.).
Unknown, The Heart Sutra: The Womb of Buddhas, Translation from the Sanskrit and Commentary by Red Pine (Berkeley: Counterpoint, 2004) ("... live without walls of the mind ..." Id. at 3).
