Euripides (c. 485-406 BCE)
“O mankind, how much you miss your aim and come to nothing! Why do you teach countless skills? There is nothing you cannot devise or discover, and yet there is one thing that you do not understand and have so far failed to hunt down—how to teach those who have no sense to think aright.”
- From Euripides’ Hippolytus (approximately line 920), translated by James Morwood in Medea and Other Plays (Oxford University Press, 1997, 1998, 2008).