大乘起信論略述 2.97

2.97

論。以對色故有至虛空之相　述曰。此釋也。以對礙色故。於無礙明闇之處說有虛空。然此無礙明闇之相是空界色眼可見相。牽起念念生滅心耳。以一切色法下。顯理無也。本以對色而立虛空。色體尚無。寧有空寂相。

[Treatise:] Because it exists in contrast to form ... the mark of empty space.
[Exposition:] This is the explanation. In contrast to obstructing form, in places of unobstructed light and dark one says there is empty space. However, this unobstructed mark of light and dark is form of the realm of emptiness, a mark visible to the eye; it merely draws forth the thought arising and ceasing from moment to moment. "Because all form dharmas..." and below reveals absence in terms of principle. Empty space was originally established in contrast to form; since the essence of form is itself non-existent, how could there be the mark of empty tranquility?