Life is an opportunity, only once. Whoever proofreads the time will suddenly grow old. What do you mean?

It means that a person's life is just a lifetime. If you count the time to live, life is meaningless, and time will run away until you get old.

deeper meaning: It is said that if we pay close attention to the change of time in our life, the aging speed will be accelerated. It is better to be careless than to live carefully.

Expanding information

Enlightenment of this sentence:

Life is just like a blank sheet of paper. People will wake up their eyes when they are suffering. What is friendship and affection? People will realize the importance of food when they are suffering. Life is only a few decades, but worries and troubles are often accompanied by laughter and happiness.

Take life as a kind of commitment, a kind of pain, and what you get in the end is a piece of garbled and useless waste paper; However, if you regard life as a kind of enjoyment and aftertaste, you will get a piece of paper that records your own life and gives an account of your own life.