Why is there always a variety of "grass and mud" in my heart?

Why is there always a variety of "grass and mud" in my heart... Because all kinds of unfairness and injustice always appear in front of your own eyes, and have nothing to do with yourself or yourself.
Everyone seems to be expecting fairness in nature. However, there is no absolute fairness in this world. As a result, we can't do anything about what happens to others or ourselves, and sometimes complain, resolve your resentment. We try to change, but we often get in the opposite direction. We doubt whether we are too weak or not. We hate this society for being too dark and often express our anger from time to time... However, in the end, we have never changed anything. Therefore, we would rather believe that our world is beautiful and our life is full of opportunities and challenges. Of course, I think so too, otherwise, isn't life too unhappy...
People have two options: change themselves and then change the world, or stay quiet. I always remember what Lu Xun said: "I am angry and sorry for my misfortune." However, I think this is also a choice. In the final analysis, human society is still a biological community. There are only two kinds of things at the top of the food chain: A natural strong and a group of unwilling people. Like lions and wild dogs in the animal world. So they are not lions, and they are not food or wild dogs.
Although humans are smarter and more advanced than animals, they have never completely escaped the animal instinct for thousands of years, therefore, the history of human society has become a history of writing various types of human attempts to separate humans from animals. Although we seem to be no longer an animal, we are no longer a food-chain society, however, by removing the layer-by-layer whitewashing, you will find that people are still animals, and society is still a complex food chain.
Some may ask, is the wild dog always inferior to a lion? Not necessarily. Isn't it common in the animal world when a wild dog is worse than a lion? So everyone may stand on the top, but the path of the wild dog is more difficult than the lion...
Therefore, we do not have to always look at the enemy of the boss, because this is your choice, and people are always responsible for your choice.
I hope that you can read these words to cut your mind into a few more, which is my own favor...