Wrongly viewed among people of the world, not understanding anything is itself considered emptiness. This is not real emptiness; it is all delusion.
Without any confusion in mind, without slacking off at any time, polishing the mind and attention, sharpening the eye that observes and the eyes that see, one should know real emptiness as the state where there is no obscurity and the clouds of confusion have cleared away.
Wisdom exists, logic exists, the Way exists, mind is empty.
– From the Book of Five Rings.