The Hardest Aspect of Teaching

I think the part that I have found the most difficult over the years is explaining to students ideas that I think are false. In order to render our students well-educated, we have to tell them what the menu of ideas is in the discipline. And so I think what I found hardest over the years was doing justice to ideas that I just didn't believe in. There was a friend now, unfortunately, who was no longer living, who used to put it this way. He always said, I can teach that the earth is round and I can teachthat the earth is flat. But when it comes to the flat part, my heart just isn't in it.