Say, what is the difference between yesterday and today?

Yesterday represents the past, and the attribute contains experience; Today is what is happening now, and it can be changed. The property is live and can be explored. I think for many people who are running for their lives, yesterday is no different from today. If I am working now, I will work tomorrow, but because I am a thoughtful animal, what happens every day is not exactly the same, so everyone feels differently about that day. Always full of longing for tomorrow, it is also possible to express nostalgia for yesterday. It's just an idea in people's minds. Time always rolls forward, and people only grow old from yesterday to today until later.