I still cannot fathom how difficult it was for the women I met to find out that they were HIV-positive. It is such a courageous undertaking in countries where there is still considerable stigma about the disease. They got tested to ensure that their unborn babies would have a chance of life by being born free of the virus.
You have no choice as a professional chef: you have to repeat, repeat, repeat, repeat until it becomes part of yourself. I certainly don't cook the same way I did 40 years ago, but the technique remains. And that's what the student needs to learn: the technique.