_Teachers_ are needed. To raise a people from barbarism, the simple but efficient means of common schools must be everywhere diffused; and higher schools too must be established, and vigorously conducted. To teach the hundreds of millions of adult heathen in week-day schools and in Sabbath-schools, and more especially to instruct and train the hundreds of millions of heathen children and youth, cannot be done by a few hands. We forbear to make a numerical estimate: any one may estimate for himself. The number must be great, even though we look upon them rather as a commencing capital than as an adequate supply, and expect that by far the greater part of laborers are to be trained up from among the heathen themselves. It is preposterous to think of imposing all this labor on a few ministers of the Gospel. _Physicians_ are needed. They are needed to benefit the bodies of the heathen; for disease, the fruit of sin, is depopulating with amazing speed a large portion of the heathen world. The nations, many of them at least, are melting away. Let physicians go forth, and while they seek to stay the tide of desolation which is sweeping away the bodies of the heathen, let them improve the numerous and very favorable opportunities afforded them of benefiting their souls. The benevolent, sympathizing, and compassionate spirit of Christ, led him to relieve the temporal sufferings of men, while his main aim was to secure their eternal salvation. Unless we show, by our exertions, a desire to mitigate the present woes and miseries of men, how shall we convince them that we truly seek their eternal welfare? Physicians must throw their skill in the healing art at the feet of the Saviour, and be ready to use it when and where he shall direct. The number who should go to the heathen cannot, and need not, be named. It is unnecessary to remark that _printers_, _book-binders_, and _book-distributers_ are needed to carry on the work of the world's conversion. _Civilians_ too are needed: men skilled in laying the foundation of nations and guiding their political economy. Should such men go forth, and evince by a prayerful, godly, and disinterested deportment and course of procedure, that their sole aim was to promote the happiness of the people, both temporal and eternal; there are many barbarous countries where they would readily acquire much influence, and be able in a gradual manner, by friendly and prudent suggestions to the rulers, and in other ways, to effect changes that would be productive of incalculable good. Many changes, with pains-taking and care, could be made to appear to the rulers to be really for their interest, as well as for the interest of the people; and more light and knowledge, without the intervention of any new motive, would soon introduce them.