首楞嚴義疏注經 6.271

6.271

大勢至菩薩由念佛三昧都攝六根，淨念相繼，入無生忍。今謂凡是有為皆屬行陰遷變，念性生滅正是無常，如何以無常因獲常住果，故非圓通。然念佛法門此方最要，雖云生滅，要因念想專注在懷，兼佛願力，直生淨土。生彼國已，進行彌速，即證有期。今顯圓根，觀音為上，抑揚之道，故須揀也。

Bodhisattva Mahāsthāmaprāpta, by means of the samādhi of mindfulness of the Buddha, gathered in all six faculties so that pure mindfulness continued uninterrupted, entering the forbearance of non-arising dharmas. Now it is said that whatever is conditioned belongs to the flux of the aggregate of formations, and the arising and ceasing of the nature of mindfulness is precisely impermanence. How can an impermanent cause obtain a permanently abiding result? Hence it is not perfect penetration. However, the gate of mindfulness of the Buddha is the most essential for this realm: although it is said to arise and cease, its key lies in concentrating mindfulness within the heart, combined with the power of the Buddha's vows, so that one is directly born in the Pure Land. Having been born in that land, one's progress is ever swifter, and realization is certain within a set time. Here, to reveal the perfect faculty, Avalokiteśvara is supreme; according to the method of depreciation and exaltation, it must therefore be set aside.