大方廣佛華嚴經搜玄分齊通智方軌 5.4

5.4

First, as for distinguishing the name: on account of what meaning is it called "Entering the Dharmadhātu"? Answer: Its "dharma" has three kinds, namely, phenomena known by the mind, intrinsic nature, and rule; here it connects to all three. "Dhātu" is the universal nature of all dharmas, and is also cause and boundary. "Entering" means obtaining this Dharma-gate.