Illuminating essays by passionate and well-recognized American Catholic intellectuals on the interaction between faith and work. Divided into four parts—Five Opportunities, Marks of the Faith, Spiritualities, Discipleship and Practices—As Leaven in the World visions Catholicism as a cultural force that shapes morality, the arts, creativity, cultural conversation, social justice, spirituality, and vocation. And it invites educational leaders and intellectuals to take seriously their vocation—indeed, their holy work—of teaching others how to see, listen, hear, understand, and engage the world from a Catholic perspective.