People have to experience many things in this life and meet many people, including sadness and joy, separation and union. Most of these things will become things of the past and eventually become like smoke and wind, but a small part of them are not willing to be like this. Some yesterdays have passed, but they have not really passed. They have become something called memories. The wind will not blow away the smoke and they will not drift away. They will stand behind every tomorrow with bright colors and become the cause of all futures.
Either after experiencing the vicissitudes of life, there will be no more vicissitudes of life, or after experiencing the vicissitudes of life, we will continue to experience the vicissitudes of life.