NAGARJUNA
In his Treatise on the Maha-Prajna-Paramita Sutra, writes:-
“Emptiness demolishes all dharmas (concepts) so that the only thing that abides is emptiness (sunyata). After emptiness has already demolished all dharmas, emptiness itself should also be set aside. It is because of this that we require the ‘emptiness of emptiness’ (sunyata-sunyata). Whereas emptiness conditions all dharmas, the emptiness of emptiness conditions only emptiness.”