雲門匡真禪師廣錄 2.154

2.154

[Yunmen] brought up [the following]: "One day Huangbo raised his hand and made a pinching gesture, saying, 'The old upādhyāyas of the world are all right here. If I open a line of retreat, you may run horizontally and vertically at will; if I do not let you pass, it will not take more than a single pinch.' A monk asked, 'What happens when you open a line of retreat?' Huangbo said, 'Running horizontally and vertically.' He asked again, 'What happens when you do not let them pass and it takes no more than a single pinch?' Huangbo said, 'Universal.'" Again, a monk asked the Master, "What is 'running horizontally and vertically'?" The Master said, "Take pity on this old monk's advanced age." The monk said, "What is 'universal'?" The Master said, "The light of heaven shines back." The monk said, "What is 'the light of heaven shines back'?" The Master said, "Few people know of rotting bones."