དེ་དག་ནི་སུས་ཀྱང་བཤད་པ་མེད་ལ། ཐོས་པ་ཡང་མེད། ཀུན་ཤེས་པ་ཡང་མེད་དོ། །
“Divine princes, if, for example, two people standing in the defile of a ravine were to praise the Buddha, and likewise praise the Dharma and the Saṅgha, and if two echoes were to reverberate from the sound of the words of those two people, what do you think, divine princes, would the first echo hear or cognize the second echo?”
Buddha, Qualities, Enlightenment