of God, are called willingly and actively to offer themselves to God as perpetual oblations of thankfulness and praise. The best commentary on “living sacrifices” is Hebrews 13:15–16: “Through Jesus, therefore, let us continually offer to God a sacrifice of praise—the fruit of lips that confess his name. And do not forget to do good and to share with others, for with such sacrifices God is pleased.” “Which is your reasonable service” highlights the ethical significance of human nature as rational.