As for the reasonings that ascertain all phenomena as lacking a nature, the other one [that is, Nihsvabhāvavāda] is vaster, while the [description of] the definitive meaning of what is to be experienced through meditation is more profound in this system. Because its explanation of nothing but non-dual wisdom as what is to be experienced as a result of meditation very greatly accords with the vajrayāna [systems], this [latter] system is more profound.

-- Sakya Chogden