We look for it but do not see it; we name it “subtle.” We listen for it but do not hear it; we name it “rare.” We grope for it but do not grasp it; we name it “serene.” These three cannot be fully fathomed, Therefore, They are bound together to make unity. Of unity, its top is not distant, its bottom is not blurred. Infinitely extended and unnameable, It returns to nonentity. This is called “the form of the formless, the image of nonentity.” This is called “the amorphous.” Following behind it, you cannot see its back; Approaching it from the front, you cannot see its head. Hold to the Way of today to manage the actualities of today, thereby understanding the primeval beginning. This is called “the thread of the Way.”