肇論新疏 2.389

2.389

若一心見色，則唯色非空；若一心見空，則唯空非色。然則空色兩（殊）陳，莫定其本也。

If with one mind one sees form, then it is solely form and not empty; if with one mind one sees emptiness, then it is solely empty and not form. Then emptiness and form are set forth as two different things, and their source cannot be determined.