瑜伽論記 6.108

6.108

下明四善巧：一、於晝夜分了知善惡增長衰損；二、於晝夜由習衣服等善惡衰退如實了知；三、思擇為依於不善法驅擯遠離；四、於善能修，此四足前六為十善巧。

Below, the four skills are explained: 1. in the divisions of day and night, knowing the increase and decrease of wholesome and unwholesome; 2. in the day and night, knowing as it really is the decline and degeneration of wholesome and unwholesome due to habituation to clothing and the like; 3. relying on discrimination, expelling and keeping far from unwholesome dharmas; 4. being able to cultivate the wholesome. These four, added to the previous six, make ten skills.