Forbes, Dear Student: I Don't Lie Awake At Night Thinking of Ways to Ruin Your Life, by Art Carden (Rhodes College, Department of Economics):

One of the popular myths of higher education is that professors are sadists who live to inflict psychological trauma on undergraduates. …

I’m here to be a mentor and instructor. This means that our relationship differs from the relationships that you have with your friends and family. Please don’t infer from this that I don’t care about you, because I do. A lot. I want to see you make good choices. I want to see you understand basic economics because I hope it will rock your world as it continues to rock mine and because the human consequences of lousy economic policy are enormous. That said, you should never take grades personally. I don’t think you’re stupid because you tank an exam, an assignment, or even an entire course. Economics is hard. A D or an F on an economics exam does not diminish your value in God’s eyes (or in mine) or indicate that economics just isn’t for you. It probably means you need to work smarter, and I’m here to help you with that.

Dear student, I once thought as you do. I once carried about the same misconceptions, the same litany of cognitive biases, and the same adolescent desire to blame others for my errors. I was (and remain) very poorly served by my immaturity. As shocking as it may seem, I still cling to a lot of it, even after four years of college, five years of graduate school, and now five-and-a-half years as a professor. Economics is hard, but becoming a responsible member of a free society is very, very, very hard. I’m still learning to put aside childish things. I hope you will do the same. Start now. The effort is daunting, but the rewards are substantial.

(Hat Tip: Greg Mankiw.)