Archbishop Cranmer came out with this quote in the context of Christian schools, but it is of much wider relevance and well worth quoting:
Mission belongs to God and flows from the heart of God: it is not an exclusively human activity. There is perhaps no more vital a role for a mission-orientated church than engagement in the task of education, to help impart truth, forge peace, renew creation and tell of the redemption of humanity and the coming Kingdom. It is distinct from evangelisation – indeed, it is much bigger: it is not the task of church schools to convert children: it is, as Moltmann puts it, to embrace all activities that serve to liberate man from his slavery. Evangelism has to be the focus of mission, but expressed through love and transmitted and fostered by moral leadership.