釋禪波羅蜜次第法門 3.8

3.8

問曰：經中說二為甘露門：一者、不淨觀門；二者、阿那波那門。不說止為初門，今云何言止為初門？

Question: The sūtras speak of two gates to the ambrosia: first, the gate of the contemplation of impurity; second, the gate of ānāpāna. They do not speak of cessation as the primary gate; why now do you say that cessation is the primary gate?