四分律行事鈔資持記 3.110

3.110

漉袋中，制意為二，初敘意。出家之人，修慈為本。慈名與樂，無殺為先。物類雖微，保命無異。此乃行慈之具，濟物之緣。大行由是而生，至道因茲而剋；同儔負識，勿以為輕；厥意在比，謂制畜之意，在於慈濟。今下，指非。故下，引誡。餘多單制，蟲水兩分，故云偏也。餘下，生起，上句指前。下二句示重意。準佛意者，佛制二戒，為重蟲命；今鈔重明，其意亦爾。

Under 'Water Filter', the intention of the prohibition is twofold. First, it narrates the intention. For a renunciant, cultivating compassion is the foundation. Compassion means giving joy, and non-killing is primary. Although species of creatures are minute, their preservation of life is no different. This is indeed an implement for practicing compassion, a circumstance for saving living beings. Great practice arises from this, and the supreme Path is attained through this; those of our cohort who possess consciousness, do not treat it lightly! 'Its intention lies in this' means that the intention behind prescribing its possession lies in compassionate rescue. Under 'Now...', it points out errors. Under 'Therefore...', it cites admonitions. Most other [rules] are single prohibitions, separating insects from water, hence it says 'one-sided.' Under 'The rest...', it introduces what follows; the upper line points to the preceding. The lower two lines indicate the reason for its importance. According to the Buddha's intention, the Buddha instituted two precepts out of regard for the lives of insects; the *Manual* now explains it again, and its intention is also the same.