Spread of Christianity; a path to civility
In this passage, the natives are placed on the opposite extreme of civility in comparison to the British. Those who follow Christianity are leveled on the same path of righteousness; however, the natives are described as sinners and wrongdoers for not worshipping the same God as the British. Thus, the British have the duty of saving the natives from ignorance by converting them to Christianity and showing them the right path.
(Missionaries Trying to Convert African Children to Christianity, Wikispaces)