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.