What is Christian mission? Is it verbally sharing the gospel in order to convert non-believers? Is it social justice ministry aimed at realizing God's shalom on earth as it is in heaven? Is it some mixture of both, or something else entirely? Contributors to the current issue of Anabaptist Witness engage these crucial questions through theological, biblical, and personal reflections on ministry in a wide variety of settings. While most contributors agree that mission involves all of life, disagreements are evident over the specific shape of mission practice. Still, there seems to be an emerging consensus that mission involves vulnerable encounters with others. We hope that this issue will help you answer the question, What is mission?