Do those ghosts and gods really exist in reality? Why do some people tell quite true things by reading their palms?

As for divination, I can only say that there are far more liars than people who really know divination. I have taught myself divination for some time. My general experience is that if you want to learn for 40 or 50 years, don't think about it, unless you are a guy like Zhuge and Guo Jia in the Three Kingdoms, or you are really talented in this field. There are so many things in it that it is impossible to learn without the accumulation of study and practice at that time.