One may ask, “How can thought and mental acts arise without an object?” To remove this doubt, there is comparison to a mirage.—Here thought and mental acts correspond to the mirage, and the object to the water. When a mirage makes it appearance, no real water is there, and yet the notion of real water arises. (2)
One may ask, “How in the absence of objects, can different verbal expressions arise?” In answer things are compared to an echo.—An echo is not a real sound, and yet it is heard. Similarly verbal expressions are not real things.
One may ask, “ How, in the absence of an object, can the images apperceived in trance arise?” In answer, things are compared to the moon reflect in water,–The moon reflected in water is not really in the water, and yet, because the water is wet and limpid, the moon is seen in it. So with concentrated thought. The objects which form its range are not real things, and yet they are perceived, the state of trance playing the part of the water. (7)
Forms don’t hinder emptiness; emptiness is the tissue of form.
Emptiness isn’t the destruction of form; form is the flesh of emptiness.
Inside the Dharma gates where form and emptiness are not-two
A lame turtle with brushed eyebrows stand in the evening breeze. (31)