What sentences describe how time flies, how children grow up and how old we are?

Sentences describing how time flies, children grow up and we get old are:

The children are old, but we are old. At that time, my parents also wanted us to grow up quickly, and they were old. When we are mature, they will leave. When you feel where time has gone, it is particularly important to cherish and have love. People always grow and mature in hindsight.

Two men who were young not long ago, but now their temples are gray!

We didn't expect that it would be twenty years before I could come to see you again.

You were unmarried when I left, but now these boys and girls are in a row.

I slowly understand that the so-called father-daughter-mother-son scene just means that the fate between you and him is in this life, in this life, watching his back drift away. You stand at this end of the path, watching him gradually disappear at the corner of the path, and he silently tells you with his back: don't chase.

Where has all the time gone? You are old before you feel young. I have children all my life, and my mind is full of children crying and laughing.