While, however, teaching, reading, and preaching, are the chief instrumentalities for the conversion of the world; the progress of the Gospel, everywhere, is greatly accelerated by the presence of a Christian population, whose example aids in overturning the customs and superstitions of the people, and commends the religion of Christ to their confidence. As a mission, then, adds to the number of its converts, or receives additions of civilized emigrants, its ability of becoming more and more aggressive is increased, and its powers of progression multiplied. Where reliance is placed upon education, mainly, for introducing the Gospel, its progress is necessarily slow; because a generation, or two, is needed to bring forward a competent number of agents to take possession of the field. The drawbacks, too, are very great—much seed being sown, which falls upon stony ground. If schools are conducted upon a large scale, the children must be supported by their parents; and, in such cases, the superstitions and vices of heathenism have, but too often, an easy victory over the doctrines and precepts of Christianity. In this respect no new principle has been discovered. In Christian countries, where custom, law, and the example of parents, combine to give the ascendency to virtue, who can hope that his children will escape moral contamination, if they be permitted to mingle, at will, with the vicious and depraved. How much more, then, are the children of the heathen endangered, if left in the care of licentious and idolatrous parents, among a population where the laws of virtue are unknown? To avoid these evils, Bishop Scott urges, that the native children, attending the Methodist schools in Liberia, be taken into the families of the missionaries—a system which has been pursued with success, by some of the other societies.