In the eyes of many, sincerity and a fool are the same thing. People cannot recognize what they do not have. Some people, when they see sincerity, will develop a defense mechanism. Your sincerity, to them, becomes ulterior motives or hidden agendas. Sincere people generally do not have a hierarchical mindset; they do not look down on others, do not flatter the powerful or belittle the weak, and follow the principles of respect and equality, making them very straightforward. Insincere people are basically jungle animals, believing in the survival of the fittest, looking down on those who are less capable, and fearing being looked down upon themselves, so they can only carry falsehood and selfishness.