This document discusses following Jesus in the slums of megacities, which are experiencing unprecedented population growth. Over 1 billion people have migrated to cities in the last decade, with 1.3 billion now living in slums. The author argues that proclaiming the gospel to the poor and oppressed is the starting point, as evidenced by Jesus' mission. Several examples are given of incarnational missions and indigenous church movements among the urban poor in cities like Manila, Kolkata, and Nairobi. The goal is to train and mobilize many more workers to engage in grassroots ministry, justice, and transformation with the urban poor.