Weber

"The primary task of a useful teacher is to teach his students to recognize 'inconvenient' facts - I mean facts that are inconvenient to their party opinions. And for every party opinion there are facts that are extremely inconvenient, for my own opinion no less than for others. I believe the teacher accomplishes more than an intellectual task if he compels his audience to accustom itself to the existence of such facts. I would be so immodest as even to apply the expression 'moral achievement' though perhaps this may sound too grandiose for something that should go without saying." - Max Weber, "Science as a Vocation" (1918).