The author argues that a closer and fresh reading of the Vatican II documents with an eye to the theme of mission might suggest that it is closer to the heart of the council’s original intention than a cursory and dated reading might indicate. Indeed the church’s mission is more urgent today than ever, given the shift of Christianity’s center of gravity to the Global South, massive migration to the Global North, and widespread secularism. Revisiting the council’s documents can offer substantial help for developing a theology and practice for today’s missionary church.