Cultivating spiritual development is central to the mission of Catholic higher education institutions. Studies demonstrate that service learning is a pedagogical method through which spiritual development can be fostered among undergraduates. This study builds upon prior research to analyze whether spiritual growth occurred and which dimensions of spirituality changed most significantly for students participating in the Boston College PULSE Program for Service Learning. PULSE is a year-long experience integrating weekly service with coursework in philosophy and theology through structured reflection. Quantitative findings indicate that nearly 80 percent of study participants grew spiritually. Results indicate that the most significant change occurred in the dimensions of: 1) believing in the interconnectedness of humanity and a related desire to serve humanity, 2) seeking to better understand oneself and one's purpose in life, and 3) facing religious/spiritual struggle. Interview excerpts provide detailed descriptions of how students described growth in specific dimensions of spirituality.