佛遺教經論疏節要 1.273

1.273

欲牽者，愛色貪聲莫知其止，既無自利何能愍他？知足者有二利：一不為五欲所牽，是自利；二能愍他，是利他。心既憐愍，必當教誨。《老子》云「不善人者，善人之資。」

Those dragged by desire love forms and crave sounds without knowing where to stop; since they have no self-benefit, how could they pity others? One who is content has two benefits: first, not being dragged along by the five desires is self-benefit; second, being able to pity others is benefiting others. Since the mind pities, one will certainly instruct them. Laozi says: “The unvirtuous person is the resource for the virtuous person.”