I don't know anything about Ajahn Chah's final years. Perhaps someone else has knowledge of that. It's possible that even a highly awakened person might have difficulties if they had a stroke or something like Alzheimer’s disease. But the wisdom of Dhamma doesn't change, it's still effective - as long as one is able to practice. I think we can trust in that. Hopefully, in such situations the mental habits and practices of decades will kick in automatically and suffering will not be as great as it would have been if one had never practiced. And if not, there may be karmic reasons for that. In my view "the rubber meets the road" every single day, in every moment of our lives. Even if we knew that there were rare situations where the Dhamma may be less effective, is that a reason to stop practicing?
"As Buddhists, we should aim to develop relationships that are not predominated by grasping and clinging. Our relationships should be characterised by the brahmaviharas of metta (loving kindness), mudita (sympathetic joy), karuna (compassion), and upekkha (equanimity)."
~post by Ben, Jul 02, 2009