At what age did everyone find their mission in this world?

Q: At what age did everyone find their mission in this world? A: At the age of 17-18, I gradually had some vague thoughts, but by the age of 19, I had a basic understanding. Now that I am almost 20 years old, the path of mission has already taken shape on its own. At the age of 17-18, while preparing for the college entrance examination, I came into contact with many interesting books. Perhaps it was a political lecturer who talked about his lectures at Beijing Normal University and game theory, which attracted a large number of listeners. That was the opportunity to enter a new world. I took some time to buy a book on social game theory, which made me crazily use game models for everyone and everything during those two weeks. The evolutionary game chapter in this book also led me to compile another book on evolutionary game theory. From here on, I flipped through some books, such as hidden order, chaos and order, chaos and butterflies, etc. This can be considered as leading me into the door of complexity science, although I hardly flipped through these popular science books again. It was also during this period that I bought the entire series of high school mathematics electives 3 and 4 (a considerable part of which have not yet been published) and found textbooks on spherical geometry, topology, group theory, and risk decision theory more interesting in mathematics. I even encouraged myself to buy an introduction to topology (haha, I could only understand the first two chapters at that time), and many physics popular science books were also very interesting, such as Daewoo's Shape. I haven't read many professional books on mathematics and physics, but they are very fascinating. In the months leading up to the college entrance examination, I didn't focus much on taking the exam. I bought magazines and read about global science every day, which was interesting. During this period, I also compiled many interesting cultural and engineering books, such as the Book of Changes, Tesla's autobiography, and Introduction to Bionics Many interesting things and stories were infused into my mind during that time. These are probably a kind of inertia, if you experience the new world, then everything in the old world is impatient and unbearable. Novel things are like opium and heroin, which must be constantly inhaled, otherwise there will be withdrawal symptoms and boredom with ordinary things. I also began to use my boundless imagination in these places, creating some useless and strange things that are half philosophical and half scientific. But it's okay, as long as it's fun, as long as it's interesting. I don't have to seek recognition or fame like in civil science. I just tinker with these cute and interesting little things myself, almost without anyone saying anything. After entering college, I became crazy. What made me frustrated was that reading books made me more impatient - after all, novel ideas were becoming increasingly rare, but there were also some things that I could bravely continue to do. I still felt that I had to keep those things from high school, especially a dream: I agreed to a classmate's request to invent a machine that could modify the human body at will, give wings to people, and make people immortal. I later established this promise as my dream. My understanding of this dream is constantly changing. At first, it seemed to be a problem of genetic engineering and synthetic biology? However, after delving deeper into the latter field, I realized that this may not be a biological problem. The logic of synthetic biology is simply to simulate many biochemical achievements using gate circuits and logic components, attempting to design cellular functions and even multicellular organisms (cell communities). The key to this is not biomass, but the infeasible paradigm of designing them. In a large organic body with a picture that is not yet fully clear, hundreds or thousands of chemicals, and billions of biomass, would one want to install something that has never existed before? It is expected to be impossible. This type of problem emerged from various fields in the 1970s and 1980s, and eventually converged into a new field: complexity science. Machines that modify organisms cannot be designed without a fundamental understanding of the generation and operation of large and complex systems. This is a vague big goal. At the age of 18, when I first entered adulthood, I equated my hobbies with the exploration of this goal. Now, I have stumbled about 2 years since I first entered university, delving into the progress of important cutting-edge disciplines, playing with their theories, formulas, simulation methods, and even chatting with a very talented netizen @ Yunjuan Tianshu for half a year. I have gained a lot of inspiration in basic methodology and philosophy, and have roughly understood: Why do the previous reductionist methods not work for large and complex systems? What properties should the new method possess? Why are there so many large and complex problems in our era? Is the era calling for something? It would take a lot of space to explain the answers to these questions clearly, so I won't go into detail. Last year, I had deep doubts about whether these problems could be solved. I once thought that I was facing the last problem of humanity, an impossible problem. But now, like a believer, I have developed certain beliefs and praises: how great the God of Life and Nature is. I once doubted that the vast and complex system (or life) could actually be fully understood, believing that the current era is the end of history. But if this is true, as the new life of primitive life, how can we be the "end"? History has never had an end, and an open history does not allow any rationality to glimpse its full picture. My mission is already clear, that large complex systems, or the name used to classify complexity problems, are destined to be completely transformed by a new methodology. This is the trajectory that historical rings will have, and I will be the shape of this trajectory. Let me use the summary sentence from my favorite philosophy book to illustrate all of this: exploring the world and pursuing truth!