As every teacher, like every drill-sergeant or animal trainer, knows in his practice, teaching and training have virtually not yet begun, so long as the pupil istoo young, too stupid, too scared or too sulky to respondöand to respond is not just to yield.Where there is a modicum of alacrity, interest or anyhow docility in the pupil, where he tries, however faintheartedly, to get things right rather than awkward, where, even, he registers even a slight contempt for the poor performances of others, of chagrin at his own, pleasure at his own successes and envy of those of others, then he is, in however slight a degree, co-operating and so self-moving.

-Ryle, Gilbert
Quoted in R S Peters (ed) The Concept of Education (1966), ch.7.