金剛經纂要刊定記 3.87

3.87

一中發心者，謂發廣大第一等四種心也。經文從「佛告須菩提：諸菩薩摩訶薩應如是降伏其心，乃至若菩薩有我相、人相、眾生相、壽者相，即非菩薩。」以大乘菩薩最初法爾合發是心故，十八住中居其第一。

In the first [abode], "generating the mind" means generating the four kinds of mind, such as the vast, the supreme, and so forth. The sūtra text goes from "The Buddha told Subhūti: 'Bodhisattva-mahāsattvas should thus subdue their minds..." up to "...if a bodhisattva has the mark of a self, the mark of a person, the mark of a sentient being, or the mark of a lived life, they are not a bodhisattva." Because a Mahāyāna bodhisattva at the very beginning naturally ought to generate this mind, it occupies the first place among the eighteen abodes.