This sentence is so contradictory. For example, you believe, you don't believe, but you don't believe. Really?

This sentence means that there is nothing in your opinion. For example, are there ghosts in the world? Some people think there is, because they think that some phenomena that cannot be explained by science are related to ghosts, and that there is a causal cycle between heaven and hell. Some people don't believe in ghosts in this world, and children are afraid or have some strange dreams. He thinks it has something to do with science, not ghosts and ghosts, so there is no ghost in his heart. Whether it depends on your opinion.