ནམ་མཁའ་དཔག་ཏུ་མྱེད་པའི་ཕྱིར་སྙིང་རྗེ་ཆེན་པོ་དཔག་ཏུ་མྱེད་དོ། །
If you ask why, Kauśika, it is because the boundary of great compassion cannot be apprehended. To illustrate, Kauśika, just as the boundary of space cannot be apprehended, in the same way, Kauśika, the boundary of great compassion cannot be apprehended.
Emptiness, Consciousness, Limits