A few years ago, I had a couple weeks of intense back pain. No matter what I did, it wouldn’t go away. I convinced myself that it was a sign of something terrible, a cancer beneath my sacrum. It was terrifying. The fear lasted for a week and a half, until I read something in The Power of Now about accepting your nonacceptance. That was a new idea for me, to stop trying to accept the pain and just accept that I was resisting it.