十不二門指要鈔 2.135

2.135

三、故知下，明地雨無殊利益平等。四微約諭，即一地所生，權實約法，即一雨所潤。凡地三千無隔，隨一念以俱圓；佛地三千既融，隨一應而盡具。況生感心中之佛，佛應心中之生，感應之體尚同，權實之益何別？故云但化菩薩不為二乘，其有聞法者無一不成佛，方名受潤不二。

Third, from "therefore know" onward, clarifying that ground and rain are without distinction and the benefit is equal. The four subtleties in terms of metaphor are what is produced by the single ground; the expedient and the real in terms of dharma are what is moistened by the single rain. The three thousand of the ordinary ground are without separation, entirely perfect along with a single thought-moment; since the three thousand of the Buddha ground are fused, they are fully possessed along with a single response. How much more so when sentient beings stimulate the Buddha within their minds, and the Buddha responds to the sentient beings within his mind! Since the essences of stimulus and response are still identical, what difference is there in the benefit of expedient and real? Therefore it says: only converting bodhisattvas, not for the two vehicles; those who hear the Dharma, not one fails to become a Buddha. Only then is it called the nonduality of receiving moisture.