大方廣佛華嚴經搜玄分齊通智方軌 2.4

2.4

First, explaining the title: "Buddha" is the master of conversion; "ascent" means advancing upward; "Sumeru" is the mountain of wondrous height; "peak" means dwelling atop the superior and exalted. Question: Why are the four assemblies from this point downward spoken in the heavens? Answer: Because the stages of virtuous practice are accomplished and hindrances are eliminated, pure and superior, they are therefore spoken in the heavens. This answers the previous question regarding the stages of the ten abodes.