ནང་སྟོང་པ་ཉིད་ནི་ནང་སྟོང་པ་ཉིད་ཀྱིས་སྟོང་སྟེ། དེ་ཅིའི་ཕྱིར་ཞེ་ན།
If you ask why, it is because these two, the emptiness of internal phenomena and the perfections, are without duality and cannot be divided into two.
Emptiness, Perishing, Non-duality