Main contents of translation:
Don't dwell on trivial things, complain every day, or worry too much. Living every day well is the best medicine for health and longevity.
In short, it is foolish for people to be confused by what is in front of them, to worry about what has happened, or to worry too much and spend useless energy. Today is another day, thank you. Hard work is the foundation of luck.
Don't worry too much, work hard ~)