首楞嚴義疏注經 1.177

1.177

此正陳妄體也。目即眼根，心即意識，根識虛妄猶如空華，若執有體能見能樂，豈唯迷於法空，亦起人我見愛。故下文云「六為賊媒，自劫家寶，無始虛習，住地無明，皆由根識，更非他物。想相為塵，識情為垢，生死輪轉莫不由斯。」故下推徵，令知虛妄。

This directly states the substance of delusion. 'Eyes' refers to the eye faculty; 'mind' refers to the mental consciousness. The faculties and consciousnesses are unreal, like flowers in space; if one grasps them as having a substantial essence that can see and can delight, not only is one deluded regarding the emptiness of dharmas, but one also gives rise to the affection and views of self and others. Therefore, a later passage states: 'The six serve as matches for thieves, robbing one's own family treasures. The beginningless unreal conditioning and the avidyā of entrenchment are entirely due to the faculties and consciousnesses, and nothing else. Conceptualized characteristics become dust; conscious feelings become defilement. Transmigration through birth and death is entirely caused by this.' Therefore, the inquiry and examination follow below to make him realize their unreality.