Mindfulness is a state wherein one is totally aware in any situation and so always able to respond appropriately. Yet one is aware of being aware. Mindlessness, on the other hand, or "no-mindness" as it has been called, is a condition of such complete absorption that there is not vestige of self-awareness.
Philip KapleauThe uniqueness of zazen lies in this: that the mind is freed from bondage to all thought forms, visions, objects, and imaginings, however sacred or elevating, and brought to a state of absolute emptiness, from which alone it may one day perceive its own true nature, or the nature of the universe.
Philip KapleauZen Master Dogen has pointed out that anxiety, when accepted, is the driving force to enlightenment in that it lays bare the human dilemma at the same time that it ignites our desire to break out of it.
Philip KapleauIf you fall into poverty, live that way without grumbling - then your poverty will not burden you. Likewise, if you are rich, live with your riches. All this is the functioning of Buddha-nature. In short, Buddha-nature has the quality of infinite adaptability.
Philip Kapleau