In regards to missiology David Livingstone was ahead of his day. He hadn't been in Africa (South) long before he understood that "an extensive native agency is the most efficient mode of spreading the gospel". It became clear to him that "the only way far-flung tribes could be reached effectively was through African workers." Hence he sought to win and train Africans to reach Africans who would establish African missions and churches. Livingstone found it "quite exhilarating", when, in 1851, he saw that Sebubi, an African teacher, chose to take responsibility for a mission station.