Is this world really just what humans imagine it to be? How many things are there that we don't know? Maybe there are many, maybe there are very few. It seems that everything is half-believed. Are we really so quiet when we live quietly? Maybe everything is not what we imagine. Every country will have a department to deal with unconventional things, just to let all people be quiet. Everyone seems to understand that there are many unknown things in this world, and everything is full of confusion. For some things, people only give it a half-belief attitude. Why can't anyone deny something that no one has seen? Maybe everything is self-deception. Maybe others are skeptical about certain things, but I am a believer.