All beings with two, three, four, or five senses. . . . in fact all creation, know individually pleasure and displeasure, pain, terror, and sorrow. All are full of fears which come from all directions. And yet there exist people who would cause greater pain to them. . . . Some kill animals for sacrifice, some for their skin, flesh, blood, . . . feathers, teeth, or tusks; . . . some kill them intentionally and some unintentionally; some kill because they have been previously injured by them, . . . and some because they expect to be injured. He who harms animals has not understood or renounced deeds of sin. . . . He who understands the nature of sin against animals is called a true sage who understands karma. . . .

(The Panchadasi)