首楞嚴義疏注經 2.156

2.156

舉此明暗、通塞、空有、染淨八種之相，皆仗因托緣以立其象也。

Adducing these eight kinds of forms—brightness and darkness, passage and obstruction, emptiness and existence, defilement and purity—all of them establish their appearances by relying on causes and depending on conditions.