— Chinul (1158-1210)
After awakening, it is necessary to always observe and examine yourself. When errant thoughts suddenly arise, do not go along with them at all; reduce them, reduce them, until you reach the point of noncontrivance, which alone is the ultimate end. This is the ox-herding practice carried on by all illuminates after their enlightenment. Even though there is subsequent cultivation, they have already realized sudden enlightenment.