佛果圜悟禪師碧巖錄 3.39

3.39

垂示云。魚行水濁。鳥飛毛落。明辨主賓。洞分緇素。直似當臺明鏡。掌內明珠。漢現胡來。聲彰色顯。且道為什麼如此。試舉看。

The pointer says: When fish move, the water grows turbid; when birds fly, feathers fall. Clearly discern host and guest; thoroughly distinguish black and white. Directly like a bright mirror on its stand, a luminous pearl in the palm: a Chinese appears, a barbarian comes; sounds are manifested, colors revealed. Tell me, why is it like this? See the following case to test it.