Well you might try.

I don't speak dishonestly of you because it would prove to be no example for you to follow, and because I would have no one take false impressions of you.

I care not what you say of me so long as it is truthful, and you will certainly not imply that you'd committed yourself to a virtuous life here before I ever chose to correct you. It does no justice to the progress you've made here.

You will not disrespect me or yourself in such a manner again. Am I perfectly clear?