If a fish could talk, ask it what is the most important thing to it in the world, and it would probably not be able to answer. It may think of a colorful stone or the lush reeds on the unknown shore, but it will not think of water. Because you are completely immersed in it and you can use it at will, everything has become a habit. When will the presence of water be discovered? ——When there is no water. It wasn't until one day when my breathing suddenly stopped, that I realized that without water, I was just a dying fish.