Youth is not something we care about when we are in our prime, but once we miss that past, it makes people sigh every time we talk about it. It's not that we are enjoying it and forgetting the present moment, it's just that we intentionally forget it. This seems to be some kind of self-salvation or self-cultivation ability. Although we perceive the speed of its disappearance, it is like the whistling of the night wind passing by our ears yesterday. The sound is so familiar, but we can no longer find it. When we look back, we will eventually discover such a fact that exists but has been ignored for a long time: Although you are here, even if you cannot live forever; before decay, I loved you to the core.