The Lord would have the teachers of our Sabbath-schools examine themselves whether they be in the love of God. There will be tests and provings of God to try the character in the experience of all who are working in the cause of God. The teachers should be constantly learning and striving for a more thorough understanding, a right judgment in the things of God. There is danger of the teachers becoming self-confident, and so filled with self-esteem that they will not realize their own deficiencies, that there is with them a narrowness of ideas, and they do not broaden or expand. They do not become more and more capable, but more and more self-important. They do not bring Jesus into their hearts and into their experiences. The teacher should cultivate his powers, cultivate his speech so as to speak distinctly, giving intelligent articulation. The mental powers should be cultivated, not be left so weak, and the powers of thought so confused, that they can not explain nor understand the doctrines of our faith. If the teacher is not one of sincere piety, of purity, of self-denial, of willingness to endure inconvenience, then he is not fit for the great and solemn work. It is the duty of the teacher to test his own powers, his own spirit, and understand his true position before God, by close examination. TSS 95.1
Those whose duty it is to select teachers should be guarded, and not urge those into the school who are not fitted to exert a good influence. How is the teacher's behavior? Is he punctual? Is he cleanly and neat? This should have attention; for these qualities are essential in a teacher. How can he enjoin these necessary acquirements upon the class unless they have an example of punctuality, of neatness, composure, and order? If the teacher is not in his place, and the class are left to amuse themselves, and the teacher comes rushing in breathless, behind time, the influence is leading to nonpunctuality and disorder. TSS 95.2