首楞嚴義疏注經 2.474

2.474

所現不一，故云種種，皆是災惡所表前相。凡夫五濁同業共感，如惡相國。諸佛淨土唯一清淨，如不見國。

What appears is not singular, hence it is said 'various'; all are precursor signs portending calamities and evils. Ordinary beings in the five turbidities collectively incur shared karma, like the state with evil signs. The pure lands of the buddhas are solely pure, like the state where they are not seen.