This is from a Taiwanese student, (normal I guess) learning English.
"my free way to spend time is sleep. Because it can really relax. When I am sleeping I don’t need to think about homework the friendship or any terrible things. If I have a beautiful dream that will be better.(sic)
I hope you’ll do better job than his previous teacher.
As for insanity, that is just a literary term for mental illness and I have no idea how it relates to Taiwan student