"To see nothing is to perceive the Way, and to understand nothing is to know the Dharma, because seeing is neither seeing nor not seeing and because understanding is neither understanding nor not understanding. Seeing without seeing is true vision. Understanding without understanding is true understanding."
"Only when you understand nothing is it true understanding"
I'd like to try to decipher this with you guys and gals if you're up for it.
I guess I'll take a shot at it first.
I think he's talking about understanding and viewing everything exactly how it is, without conceptual elaboration. With our minds we project mistaken reality onto reality. We add mistaken reality where there is none. If you strip away all these conceptual elaborations we project onto reality, there's only the emptiness of inherent existence left. Which is simply suchness.