摩訶止觀 4.32

4.32

何以故？依無起見，故不應著；乃至依非有非無起見，皆名著我、人、眾生、壽者。觀如是等法與非法，皆即是空。由此觀故，能順無漏，防止有、無，六十二見，故名「隨道戒」。若重慮此觀，思惟純熟，歷緣對境，於一切色、聲，皆悉即空，名「無著戒」。防止思惑，善順真諦，是名「觀因緣心即空持二種戒」也。

Why is this? Because views arise based on non-existence, one should not cling; even arising views based on neither existence nor non-existence are all called clinging to self, person, sentient being, or soul. One contemplates such dharmas and non-dharmas as being entirely identical with emptiness. By means of this contemplation, one can comply with the undefiled and guard against existence and non-existence—the sixty-two views; hence it is called the 'precept following the way'. If one repeatedly reflects on this contemplation until one's thinking is fully matured, encountering conditions and confronting objects, all sights and sounds are entirely identical with emptiness; this is called the 'unattached precept'. Guarding against the delusions of thought and wholesomely complying with the ultimate truth, this is called 'contemplating that the mind of causes and conditions is identical with emptiness to uphold the two kinds of precepts'.