Don't worry about tomorrow. I'll worry about tomorrow. I want to be happy, work hard and be gentle with people.

Osamu Dazai?

Theme: positive optimism, attitude towards life, etc.

When I turned around, the wind blew my black hair, and when I turned around, it was snowy.

Yu Guangzhong

Theme: cherish time, time flies, etc.

The meaning of youth is that even if you are in tears, it is still a requiem mixed with rock flavor.

-Seven years of viola.

Theme: youth, growth, teenagers, etc.

In fact, people and trees are the same. The more they yearn for the sunshine in the high places, the more their roots will extend to the dark underground.

-Nietzsche

Theme: growth, surpassing oneself, etc.