It is of course a familiar precept that the teacher must try to arouse the interest of his pupils in all that he teaches. However, this precept is generally meant and understood to denote the idea that learning is the end and interest the means to attain it. I wish to reverse that relationship. Learning must serve the purpose of creating interest. Learning is transient, but interest must be lifelong.

Herbart (1982c, p. 97), as cited in: Norbert Hilgenheger, "Johann Friedrich Herbart (1776-1841)." Kwartalnik Pedagogiczny 3-4 (1999): 5-26.