It's an obstacle on the path to surpass, it's just that most people do go through it to some degree. For some it's severe: my old teacher told me about a co-stu

It's an obstacle on the path to surpass, it's just that most people do go through it to some degree. For some it's severe: my old teacher told me about a co-student who solved Mu and then became extremely arrogant and left the sangha saying he doesn't need them anymore. For some it's much more mild