金光明最勝王經疏 4.20

4.20

下結所以。真理，語言道斷、心行處滅，故不可說。心無色相猶如於幻，無實事業不可造作。此意同於《文殊所問發菩提心經論》「菩提不可身得、不可心得，身假心幻故。」廣如彼釋。此但問心。

Below, he concludes with the reason. The true principle is such that the path of speech is cut off and the locus of mental activity is extinguished, so it is ineffable. The mind is without form or marks, just like an illusion; having no real activity, it cannot be fashioned. This meaning is identical to the *Mañjuśrī-paripṛcchā-bodhicitta-śāstra*: "Bodhi cannot be attained by the body, nor can it be attained by the mind, because the body is nominal and the mind is illusory." This is extensively explained as in that text. Here, he only asks about the mind.