妙法蓮華經玄義 4.161

4.161

二、性地位者，得過乾慧，得煗已，能增進初、中、後心，入頂法，乃至世第一法，皆名性地。性地中，無生方便，解慧善巧，轉勝於前，得相似無漏性水，故言性地也。

Second, the stage of nature: having surpassed dry wisdom and attained heat, one is able to advance through initial, middle, and final minds, entering the dharma of summits, up to the supreme worldly dharmas—all are called the stage of nature. In the stage of nature, the skillful means of non-arising and the understanding wisdom are skillful, increasingly superior to before, attaining the water of the nature of resembling untaintedness; hence it is called the stage of nature.