‘When you practice and learn the reality of zazen thoroughly, the frozen blockage of illusory mind will naturally melt away. If you think that you have cut off illusory mind, instead of simply clarifying how illusory mind melts, illusory mind will come up again, as though you had cut the stem of a blade of grass or the trunk of a tree and left the root alive. This is very natural…
The one-mind which manifests either as thought or no-thought must be something which is beyond these conditions.’ (Samadhi of the Self)