You can be kind, but you must bring your own edge. Where does it come from?

What is the crux of the problem? This fact is of great significance to me, and I believe it also has a certain significance to the world. You must be kind, but have an edge. What will happen if it happens, and what will happen if it doesn't happen. To sum up, these are not entirely important. The more important issue is that this is inevitable. You must be kind, but have an edge. What will happen if it happens, and what will happen if it doesn't happen. I hope that everyone will conduct discussions in the spirit of saying everything they know and speaking without restraint. Those who speak are not guilty and those who hear are warned. We all know that as long as it makes sense, it must be considered carefully. Hu He summed up his life experience in this sentence, only art and science can improve people to the height of holiness. This made me think deeply.