8. He should know every scholar, so that he can check them off without asking the teacher the name, and should have a quick, vigilant eye, not only for his own duties, but, also, in order to communicate valuable suggestions respecting the school to the superintendent. 9. In the absence of the superintendent, he may sometimes take his place in the charge of the school, except in the case of very large schools, which may require an assistant to the superintendent. VIII. THE TEACHER. The true Sabbath-school teacher is one called and "sent of God;" for we read (1 Cor. xii. 28), "And God hath set some in the church, first apostles, secondarily prophets, thirdly _teachers_;" and the same divine lips which said "Go preach," said also "Go teach." Whosoever receives this sacred call should devote himself to it by a holy consecration, remembering that he is truly an ambassador from the King of kings to a small circle of his rebellious subjects,--a ransomed sinner offering pardon to precious youth condemned to die. His great business is the preparation of young immortals for the kingdom of heaven through the application of heaven-revealed truth by a simple appeal to their intelligence and feelings through the power of the Holy Spirit. This is truly an angel's errand entrusted to redeemed sinners. Mr. Groser justly says: "The office of a Christian teacher transcends all others in interest and importance. No matter what his precise sphere of labor may be, whether that of a professor like Chalmers, a pastor like Oberlin, a schoolmaster like Arnold, or a Sunday-school teacher like the 300,000 men and women who on each returning Sabbath seek to instruct our youth in those truths which are able to make them wise unto salvation." He should, therefore, accept his mission thankfully, and enter upon it heartily, and attend to his duties punctually, faithfully, and earnestly. He is to teach Bible truth. That is the divinely provided aliment for the human mind, and if rightly taught and received it will be attractive and satisfying to the soul, and all besides will be only supplementary. To be able to teach Bible truth thus faithfully and truly, calls for _hard_, _earnest_ work, for, says one of the English bishops, "It takes all we know to make things plain." The teacher, therefore, must needs be well furnished and thoroughly fitted for his high calling. This brings us to the next article, on the teacher's preparation. IX. PREPARATION.