The way the suchness of dependent origination is expounded
This has three sections: (1) how this is presented in the perfect scriptures, (2) how the meaning of the scriptures is established by reason, and (3) enumerations of emptiness: the established conclusion.
The first has two parts: (1) citations showing how it was taught in the scriptures and (2) identifying the forces opposing the understanding of suchness.
Citations showing how it was taught in the scriptures
Here in the Ten Grounds Sutra it states:
When the bodhisattva on the fifth ground enters the sixth ground, he does so by means of ten perfect equanimities with respect to phenomena.
What are these ten?
They are (1) the perfect equanimity of all phenomena in their absence of signs;
(2) the perfect equanimity of all phenomena in their absence of defining characteristics, likewise (3) in their absence of birth, (4) in being unborn, (5) in being void, (6) in their primordial purity, and (7) in their freedom from elaborations;
(8) the perfect equanimity in their absence of affirmation and rejection;
(9) the perfect equanimity of all phenomena in their resemblance to illusions, to dreams, to mirages, to echoes, to reflections of the moon in water, to mirror images, and to conjurations;
and (10) the perfect equanimity of all phenomena in their absence of the duality of real and unreal.
When he realizes the nature of all phenomena in such terms, because of his sharp and apposite forbearance, he will attain the sixth ground — namely, The Manifest.