"At this time you think this is enlightenment, but you should doubt even more; who hears this sound? If you go on investigating without producing a single thought, the realm where it seems like nothing exists, like empty space, also dies out, there is no more taste at all; where it is dark as night, if you exert all your power to fully doubt what it is that hears this sound, then when the doubt shatters and you are like someone who has completely died coming back to life, this then is enlightenment, satori." - Bassui