大般涅槃經義記 4.151

4.151

下明對治煩惱行中，初答處濁不污如花，明人依法能離煩惱；後答云何處惱不染，明法資人能治煩惱。前中三喻：一蓮華喻、二優鉢羅喻、三清風喻。蓮華一喻正答上問，後二乘舉助以顯法。此三喻中，初喻生善，先喻，次合，「是故我」下舉說證成，「彼一闡提」下彰其分齊，除却闡提；第二明其所生善法不為惑染，先喻，次合，「何以」下釋；第三風喻明能滅惑，先喻，次合，後除闡提。

Below, in explaining the practice of counteracting afflictions, it first answers being in defilement without being tainted like a flower, explaining that a person relying on the Dharma can leave afflictions; later it answers how one abides in afflictions without being defiled, explaining that the Dharma supports the person to cure afflictions. In the former there are three parables: first, the lotus parable; second, the utpala parable; third, the pure wind parable. The single lotus parable directly answers the question above; the latter two are added to help reveal the Dharma. Among these three parables, the first parable is the generation of good: first the parable, next the combination; from "therefore I..." onward adduces the teaching to verify it; from "that icchantika" onward reveals the limitation, excluding the icchantika. The second explains that the wholesome dharmas generated are not tainted by delusion: first the parable, next the combination; from "why?" onward explains it. The third wind parable explains the ability to extinguish delusion: first the parable, next the combination, and finally excluding the icchantika.