Is in not truly sad that they can and do say so blatantly, don't be led by your emotions. I would agree that we should not react to our emotions, without first thinking about what might result. But our emotions are one thing that sets humans apart from other animals. They really want their followers to shut off their emotions- that is truly sick.
I'm sure many here have already done so but please look up the definition of a sociopath and then re-read this letter or any of the numerous WT horror stories. It is scarry.