以往的注疏或研究大多是從六度、四攝的角度來整理瑜伽菩薩戒本,本文則以統 計、分析之方法,考察瑜伽菩薩戒本的心理觀與倫理觀。 首先根據瑜伽行派的定義,將瑜伽菩薩戒本有關之心所(心理作用),分「染違犯、非染違犯、 無違犯」三類,並配合瑜伽行派的煩惱心所分類說明之。其次,整理並統計「染、非染、無違 犯」所提到的各種心所及因緣,使菩薩行者認識各種心理狀態,覺察某一種心理作用生起時, 可能會引起那些行為而違犯菩薩戒條。 瑜伽菩薩戒與其他菩薩戒一樣,重視與四重戒相關的貪求、慳、忿、慢等心理作用的防止;四 十三輕戒方面,由統計可知,與「染違犯」相關的心所,以「恨」-嫌恨(aghata)等出現次數最 多,達19次。若包括相關的忿、瞋恚等,則總共有25次,約占58%。可見「瞋恨心」是瑜伽菩 薩戒主要對治之心理作用。 與「非染違犯」相關的心所,以「懶惰、懈怠」(alasya-kausidya)出現次數最多,達19次之 多,約占21%。可知「精進」也是瑜伽菩薩戒本所重視的心所。 與「無違犯」相關的因緣,以「調伏」出現次數最多,達15次,約占35%。由於此等行為出於 善意,藉此讓眾生安於善法,所以被認定是「無違犯」。 由「第九、性罪不共戒」的分析可知,瑜伽菩薩戒本之善惡行為,是依據動機與結果而判斷; 若結果是「利他」、動機是「憐愍」,則可能是一種「善權方便」,不僅不是惡的行為或言語, 而且反而有很多功德。換言之,瑜伽菩薩戒本並沒有預設任何行為是絕對善或惡(例如主張: 殺人、偷盜等行為之性質一定是惡,不論動機是否出於善意,結果是否有利於他人)。

　　　　　Previously, most glosses and research on the Yogacara Bodhisattva Precepts had taken the vantage of the Six Paramitas or the Four Samgrahas. In this paper I use statistics and analysis to examine the psychology and ethical standpoints of the Yogacara Bodhisattva Precepts. First, I divide the contents of the Precepts concerning the mental elements into three categories, the Polluted Breach, the Non-polluted Breach, and the Non-breach, in accordance with the definitions of the Yogacara School. This school's classes of vexations are also used to clarify these three categories. Next, I have made classifications and statistics for the mental elements conditions of the Polluted Breach, the Non-polluted Breach, and the Non-breach, so that the Bodhisattva practitioner may recognize each psychological state. In this way, when such moods occur, the practitioner is aware that they may cause certain behaviors and breaches of the precepts. The Yogacara Bodhisattva Precepts are similar to other Bodhisattva precepts in that they emphasize preventing psychological conditions relating to the four main precepts governing greed, stinginess, anger, and insolent to others. As to the 43 secondary precepts, statistics show that moods motivated by hate (aghata), springing from Polluted Breach mental elements, are listed the most times (19). If the closely related moods of anger and enmity are included, the count goes up to 25, accounting for 58% of the total. From this we may see that 'hate' is the main objective of the Yogacara Boddhisttva Precepts. In the category of Non-polluted breaches, laziness (alasya-kausidya) appears most often, accounting for some 21% of the total with 19 appearances. The shows that diligence is a key mental element of the Yogacara Bodhisattva Precepts. The conditions relating to Non-breaches most often appearing is taming and subduing, at 15 times about 35% of the total. Motivated by good intent, this type of behavior brings living creatures harmony with good dharma, so it is classified as a Non-breach. Analyses of the Ninth, the some main crimes which are in special condition, shows that the standards by which good and bad behavior are measured in the Precepts are the motives and results. If the result is altruistic, and the motive is sympathy, this behavior may be a sort of convenience. Such an act does not count as bad behavior or language, but rather earns great merit. In other words, the Precepts do not designate any particular action as being absolutely good or bad (such as maintaining that killing or robbing and so on are absolutely bad regardless of whether or not the motive is good and the results are altruistic).