Most Christians know that we are called to glorify God, but often forget the other half of our purpose: to enjoy Him. Drawing from classic Reformed voices such as Calvin, Ursinus, Ames, and À Brakel, Zhao reintroduces the vision of covenantal eudaimonism – an approach that unites law, virtue, and happiness. Instead of reducing Christian life to rules or moral demands, it reveals how the commandments are designed to form our character, cultivate virtue, and lead us into deeper communion with God. Far from a burden, God’s law becomes a path toward flourishing, shaping us to reflect His image. In a time when many churches swing between legalism and antinomianism, the author offers a refreshing, grace-driven vision of sanctification. He shows that true obedience is not fear-driven but joy-filled: God’s glory and our happiness are inseparably joined.