Ghosts not Exist?

Some people do not believe ghosts exist. They thought there are no ghosts of dead people. Our consciousness is only a result of all the parts of our body working together. Feel, hear, taste or smell is only our brain's interpretation of our environment. There is no such thing as a soul or a part that lives on. Therefore, no ghosts, and no scientific evidence or reasoning agrees that there are ghosts. Some people said the ghost is just optical illusions. They think people’s brain can make mistakes sometimes and that is the reason why they see things that are shadowy and visional. “You may have seen moving shapes in static images, does that change color, ghosts that do not exist and even a “religious” experience.” (Optical Illusions, 2007, para.20) Some people and scientists think ghost is superstition. The contemporary East Asian term "superstition" in Chinese would appear to be a comparatively recent word, and may well reflect a Christian analysis of the religious situation. (Barrett, T. 2008, p.1) Another example is the famine period between 1959 and 1961in China. It was ravaged by what was probably the worst famine in human history in terms of the absolute number of deaths. There are many diseases disseminated that caused more death. At that time people believe it is the punishment of God. Actually, it is the failure to deal properly with the dead was one reason why chaotic spirits were now believed to be in the ascendant. (Smith, S. 2006, p.408, 419) In religion, the Bible is the definitive source for knowing anything anyone would ever want to know about ghosts, which makes it somewhat ironic that many Christians simply label all 'ghostly' phenomena as demonic and forget about it, or conclude that ghosts don't exist, when in fact that clearly do.