釋禪波羅蜜次第法門 5.169

5.169

第二、明支義。四禪有四支：一、不苦不樂支；二、捨支；三、念清淨支；四、一心支。不苦不樂支者，此禪初發與捨受俱發。捨受心數不與苦樂相應，故言不苦不樂支。二、捨支者，既得不苦不樂定，捨下勝樂，不生厭悔。復次，真定以發，未得成就，若心進勝定，則便隨念動轉，不名無動定，是故定發，心不念著，自能捨離，故名捨支。禪定分明，等智照了，故名念清淨支。定心寂靜，雖對眾緣，心無動念，名一心支。若次第明支義，如今說，通而為論，於初一支即具四支。

Second, explaining the meaning of the factors. The fourth dhyāna has four factors: first, the factor of neither-pain-nor-pleasure; second, the factor of equanimity; third, the factor of purity of mindfulness; fourth, the factor of one-pointedness of mind. Regarding the factor of neither-pain-nor-pleasure: when this dhyāna first arises, it arises together with the feeling of equanimity. The mental concomitant of equanimous feeling is not associated with pain or pleasure; hence it is called the factor of neither-pain-nor-pleasure. Second, regarding the factor of equanimity: having attained the absorption of neither-pain-nor-pleasure, one abandons the superior bliss below and does not give rise to disgust or regret. Furthermore, when the true absorption has arisen but has not yet reached perfection, if the mind advances toward superior absorption, it would then move in accordance with discursive thoughts and could not be called the immovable absorption; therefore, when the absorption arises, the mind does not cling to it in thought and is naturally able to abandon and leave it behind, and hence it is called the factor of equanimity. The dhyāna absorption is distinct and clearly illuminated by equal knowledge; hence it is called the factor of purity of mindfulness. The mind in absorption is tranquil, and although facing various conditions, the mind has no stirring thoughts; this is called the factor of one-pointedness of mind. If one explains the meaning of the factors sequentially, it is as just stated; speaking comprehensively, the first single factor already possesses all four factors.