। ॥ ९९० ॥
In plain words
Through the teaching of 'not this, not this,' because it has no form, this Self is known as bodyless. Viśva, Taijasa, and Prājña—these three comprise the empirical triad.
Close to the Sanskrit
Not this, not this, because of being formless, this one becomes bodyless. Viśva, Taijasa, and indeed Prājña, and those are the triad.