Mission as Penance explores the posture of Christian mission in Canada, while also uncovering the theological roots that gave birth to the sense of cultural and religious superiority that led to profound harm to others and to God's creation. The story begins by an examination of Johan Bavinck's famous 1954 claim that "mission is thus the penance of the church which is ashamed before God and man." By drawing on his work through forty years in theological education and pastoral ministry, Fensham prescribes a pathway that liberates the church from power games, numerical growth, and preoccupation with programs and technology, to focus instead on genuine listening, solidarity, and love in action. True penance is never satisfied with passivity, nor should it result in a state of paralysis. For a posture of humble penance to be fruitful, it must lead toward concerted action toward change, advocacy for justice, compassion for the marginalized, and care for creation. If mission in Canada is engaged in this way, the Christian faith might cease to do harm and build a new life-giving community of healing.