The blinding of a person’s will happens when he or she has fully invested themselves into something which turns out to be a terrible mistake. Not willing to accept that they have fully invested themselves in an egregious error blinds them from the reality of it. They simply will the error to be true. We see this all the time in cult interaction. You can prove to a person that he has been deceived, that he is believing and living a lie, and you may even see the distress this information is causing him, yet he sets his face, his will, and simply refuses to “understand” what you are saying.
Don and Joy Veinot, “Invested”