In What Matters Most, University of Notre Dame theology professor Leonard J. DeLorenzo urges youth ministers, teachers, and parents to help young people redefine success in light of their call to discipleship—completely saying yes to God. In Luke’s account of the Annunciation, Mary offers a true model of discipleship for young people to follow. Her example will empower them to make choices about how to live their lives as a courageous yes to God in everything they choose—just as she did. DeLorenzo, who served as the long-time director of Notre Dame Vision—a program designed to help young Catholics find their true calling as disciples of Jesus—shows how Mary exhibited four habits that will guide young people to make important life decisions: Listen carefully and practice patience. Remember who we are and what we value most. Respond with compassion to choices we face. Embrace sacrifice for the sake of love. DeLorenzo includes personal stories from his experience as a father and working with youth and young adults with spiritual wisdom to equip teachers, mentors, pastoral ministers, and parents to reexamine the way they encourage and help form young Catholics approaching significant life choices such as college and jobs. He presents ways to remedy spiritual deficits in these young people created by cultural realities such as the fast pace of tech-driven lives and the looming pressure to succeed with worldly accomplishments. Paper.