This cross-sectional mixed method community action study exploring the virtue of humility was conducted as part of a collaborative practical theology project at a pluralistic, ecumenical Mainline Protestant seminary. Students in a spiritual formation graduate class completed quantitative measures of humility, spiritual well-being, differentiation of self, mentalization, and mindfulness, while open-ended qualitative data captured their perspectives about the role of humility in formation. Qualitative results revealed important nuances about emerging religious leaders’ views on humility, including experiencing this virtue as facilitative (...) to their vocational growth, challenging, or some combination of both. Quantitative results documented positive associations between relational capacities and humility, and these links were mediated by mindful awareness. Implications for measuring and promoting holistic spiritual development among emerging religious leaders are discussed. (shrink)