The way of teaching any set of ideas must depend upon the context within which they will be understood. If this context is very different for teacher and taught, deep misunderstanding is almost bound to arise. Christian doctrine can hardly be got across to Africans who have not received any appreciable amount of western education – and that is even now the great majority – if the missionary has not first understood something of their own thought world. In some ways the missionary of the late nineteenth and early twentieth century was actually more likely to arrive at such an understanding than his successors of forty years later. The early missionaries could not open and busy themselves with loads of schools and hospitals. They were almost completely isolated from Europe and were forced to share closely in African society, once they abandoned the attempt to create independent Christian villages. Very probably there was quite a long period before any considerable number of converts was obtained. In this period they had the opportunity to acquire a fine knowledge of the local language, customs and thought forms, and many of them did so, both Catholic and Protestant. In areas and tribes where evangelisation began much later – during the last forty years – this has often not happened. Missionaries have rushed straight into the provision of social services and an extensive catechumenate without any adequate prior initiation into the local tribal mind.