John Tan:

Not only that you cannot realize emptiness without the clarity, you cannot realize dependent origination without clarity, they are both talking about radiance and light.

Another important point is we do not realize that we are analysing and understanding from the perspective from essential view.  We "negate" from the standpoint of an essential view; we understand dependent arising from an inherent view without realizing it.  We do not understand from the perspective of light and radiance.

They understand "illusion" from an essential view and thought that because of illusoriness, it is inconsequential.