Spirit presence, is it true that something is wrong in here?

I don't believe in ghost but I do believe that sometimes satan has his demons take on a form of what we would consider a ghost. Not even for them to be evil but for them to allow us to see them. Thus attempting to play mind tricks and disprove the bible. Becareful and don't concern yourself with things from the spiritual realm. While we may sometimes sense their existance it is not what we believe. It is evil