維摩經玄疏 6.56

6.56

Fourth, the gate of neither existence nor non-existence: this is the Tripiṭaka teaching clarifying the principle of neither existence nor emptiness in the arising and perishing of correct causes and conditions. If one receives this teaching, one can destroy the extreme heterodox attachments to existence and non-existence, see that causes and conditions are neither existent nor non-existent, and generate true taintlessness. Because of neither existence nor non-existence one sees the truth; neither existence nor non-existence is the gate to the supreme meaning. Channa of foul speech entered the path through this, but no treatise's explanation has yet been seen. Some say: "The Vātsīputrīya Abhidharma sets forth this intent. That treatise clarifies that 'self' is in the fifth ineffable basket; the 'self' is not of the three times, which is a dharma of neither existence nor non-existence, and hence is not empty." This, it is feared, cannot yet be definitively adopted.