““For, although the Buddhas themselves do not cling to such notions as purity and impurity or truth and untruth, they assist the beings who are to be trained and ignorant about true reality with justifications of purity and impurity or truth and untruth just as these are acknowledged by those attached beings themselves. Likewise, the noble ones are completely free from any words, thoughts, and expressions of existence, nonexistence, both, or neither with respect to arising from the four extremes. Nevertheless, for the sake of opponents who conceive of any kind of arising in terms of the four extremes, they negate such arising by relying on the functions of valid cognition as these are established through the opponents' own valid cognition.””