A comprehensive study of Jewish and Christian teaching about animals, this text argues that the treatment of animals is not only a moral issue, but also a theological and spiritual one. The authors show how Jews and Christians have often failed to promote a compassionate and sensitive regard for animals. The text argues that the way we treat animals is a benchmark of the kind of society we are, and that in recognizing the true, and biblically based, value of animals, we liberate ourselves from the idolatry which is to be found at the heart of much contemporary spirituality. It is addressed to all people of faith who believe that, in devaluing animals, we ultimately devalue ourselves and our own souls.