Zen Master Huang Po said, some 1200 years ago, “Were you now to practise keeping your minds motionless at all times, whether walking, standing, sitting or lying; concentrating entirely upon the goal of no thought-creation, no duality, no reliance on others and no attachments; just allowing all things to take their course the whole day long, as though you were too ill to bother; unknown to the world; innocent of any urge to be known or unknown to others; with your minds like blocks of stone that mend no holes – then all Dharmas would penetrate your understanding through and through.
In a little while you would find yourself firmly unattached. Thus, for the first time in your lives, you would discover your reactions to phenomena decreasing and, ultimately, you would pass beyond the Triple World; and people would say that a Buddha had appeared in the world.
Pure and passionless knowledge [Enlightenment] implies putting an end to the ceaseless flow of thoughts and images, for in that way you stop creating karma that leads to rebirth – whether as gods or men or as sufferers in hell.
Once every sort of mental process has ceased, not a particle of karma is formed. Then, even in this life, your minds and bodies become those of a being completely liberated.”