Joy in God Is the Heart of Mission

I like Newbigin. Mission is not a command, but implicit in Christianity: Joy in God Is the Heart of Mission - Desiring God:

The mission of the Church in the pages of the New Testament is more like a fallout which is not lethal but life-giving. One searches in vain through the letters of St. Paul to find any suggestion that he anywhere lays it on the conscience of his reader that they ought to be active in mission. For himself it is inconceivable that he should keep silent. 'Woe to me if I do not preach the gospel!' (1 Corinthians 9:16). But nowhere do we find him telling his readers that they have a duty to do so. . . .