大方廣圓覺修多羅了義經略疏 2.929

2.929

智也，則聖人冥證之智身。今謂得謂證者，增上慢人。若自知不證而言證者，則根本戒中大妄語戒，非此文意。

This refers to wisdom, which is the body of wisdom tacitly realized by the holy ones. Those who now claim to have attained and realized are people of overweening pride. If one knows oneself to be unrealized yet says one is realized, that falls under the major transgression of false speech among the fundamental precepts, which is not the meaning of this passage.