Life is only once, but it is full of wonderful things. Our life is like addition and subtraction in mathematics. To understand with different ways of thinking, there will be different answers, different gains and different explanations. Sometimes we can think of our life as subtraction, and sometimes we can think of our life as addition:

Life is unpredictable. When we think that life is subtraction, it means that we are losing it. 10-year-old people, who have lost the meticulous care of their parents, should begin to learn to be independent; What the 20-year-old loses is the happiness of childhood. They are no longer as carefree as when they were young, but begin to become calm. What I lost at the age of 30 was a rich campus life. The era of lifelong learning ended and my career began. What a 40-year-old loses is the sweetness of love. They can no longer enjoy the happiness of love when they were young. The right season has passed and everything has changed. What is lost at the age of 50 is the choice of life, everything is a foregone conclusion, career and family are stable, and there is no need to think about anything else; What a 60-year-old loses is a healthy body, and a strong body has now become fragile and can no longer stand the ravages of years. At every moment of life, we have something that is constantly passing away, so we should make good use of it.

When life is regarded as addition, it represents this harvest. 10 years old people have gained the ability of self-sufficiency and don't have to let their parents support you. At the age of 20, I gained vitality, which is the most important moment in my life. Both girls and boys are studying hard. 30-year-old men gain the ability to work, and men and women work hard for their families; What a 40-year-old man gains is maturity, that is, we can think calmly and remain motionless for all emergencies; The 50-year-old man has gained the experience of life and will not be deceived by life again. They see through the world of mortals and understand the good and evil of life. The 60-year-old man has gained the comfort of life. They will no longer be full of worries because of the unsuccessful career, nor will they be full of troubles because of family disharmony. Now they have a successful career and their children have grown up. Nothing can be put down, they can live in peace of mind.

In our life, addition and subtraction coexist, so we can't just calculate subtraction, and we can't just look at subtraction. Only "subtraction", then we will lose confidence in life because we have been losing it, then we will give up on ourselves, and this life will never get better; We can't just look at "addition", which will make us feel no sense of urgency and make us forget that there are still things that are constantly lost in our lives. Then we will relax ourselves. This kind of life is not enough. Only after every 365 days, we have to calculate whether it is not worth the loss or not, so that our life will have no regrets.

The British philosopher Russell said in the article "On the Approaching of Old Age": "No one's life is like a river: it was very small at first and was confined between the two sides; Then rush over the boulder and slide down the waterfall; Gradually, the river widened, the banks expanded and the river flowed more smoothly; Finally, the river flows into the sea without obvious interruption and pause, and then it seems to get rid of its own existence without pain. " Life is actually like such a river. What matters is not the result, but the wonderful process. What matters is not the length, but your excellent performance.