This is a classic novel plot that is usually used to describe the protagonist discovering some shocking truth but because he or she cannot explain or prove these truths, he or she becomes a "madman" in the eyes of the public. This situation usually occurs in novels or movies when the protagonist discovers something unusual or the truth that confuses and shocks him or her, even making it impossible to explain or prove. In this case, the protagonist would usually experience a series of setbacks and difficulties in trying to understand or explain the truth, but in the end, he might not be able to get rid of everyone's suspicion and ridicule, and become a "madman" in everyone's eyes. But this isn't necessarily crazy, because the truth is sometimes very scary, but if we don't look at them correctly, they can lead us to disaster. Therefore, after the protagonist discovers the truth, he needs to be cautious and take appropriate measures to avoid further harm or danger.