肇論新疏 3.107

3.107

玄象，天上星彩。霄謂霄漢。宮商，五音之二。合舉二喻，以喻外亡名相、內絕有無。二喻影略，具云掩玄象於霄外、閟琴瑟於堂中，却責盲聵之徒令辨玄象黑白之殊、琴聲宮商之異。何由能之？法中意云：內存有無、外存稱謂，猶恐不入。今內外雙絕，何以寄懷而悟入？

"Heavenly luminaries" refers to the stars and colors in the heavens. "Firmament" refers to the high skies. Gong and shang are two of the five musical notes. Together they raise two metaphors, which serve as metaphors for names and marks perishing externally and being and non-being being cut off internally. The two metaphors are mutually implicative; fully stated, they mean concealing the heavenly luminaries beyond the firmament and locking up the lutes inside the hall, while yet demanding that the blind and deaf distinguish the difference between black and white among heavenly luminaries and the distinction between gong and shang in lute music. How could they possibly do so? The meaning within the Dharma is: if being and non-being are retained internally and designations are retained externally, there is still fear that one might not enter. Now if both inside and outside are cut off, how could one anchor one's mind and awaken to enter?