Johann Sturm: Selections from "Correct Opening of Elementary Schools of Letters", III

"But in those teachers who are to be selected, three kinds of zeal should be observed: for the humanities, for virtue, and for teaching...Thus the teachers of letters should be not only learned but also endowed with virtue and be most avid for the fatherland and for public service...Furthermore, as to this point, care must be taken that, once the talent of those who are the best qualified is established, we always prefer those who combine ability to achieve with determination and zeal."

Johann Sturm (1507-1589), Johann Sturm on Education, Spitz and Tinsley (pp. 74-75)