大方廣圓覺修多羅了義經略疏 1.765

1.765

後三重法界者：一真空絕相觀、二理事無礙觀、三周遍含容觀。此中義意全同《華嚴法界觀門》三重行相，故依彼科之。

As for the subsequent three dharmadhātus: first, the contemplation of true emptiness severing marks; second, the contemplation of the non-obstruction of principle and phenomena; third, the contemplation of total pervasion and inclusion. The meaning and purport here are completely identical with the three aspects of practice in the Contemplation Gates of the Dharmadhātu of the Huayan, and so the sections are categorized according to it.