1, aging is also an unavoidable pain. If we are lucky enough not to die, we will face the embarrassment of aging. Hair is getting less and less and wrinkles are getting more and more. Bright eyes and white teeth become old eyes and a bunch of false teeth. I can't remember the past, but later I can't even recognize the people in front of me. When we need others' care and help most, we are so disgusting and unwilling to get close. We can only wait for death alone. Death means leaving the people and things we love, leaving everything we cherish, and we finally look forward to death, as if death is a relief, so that we are no longer lonely.

2. How rare it is to be born a human being. We didn't know before that if there were 3,000 oceans as vast as the world, there would be a wooden yoke with a small hole floating on the sea surface and a blind turtle at the bottom of the sea, which would only surface once every 100 years. The wooden yoke drifts with the waves, running around at will, and has no intention of finding a blind turtle. Blind turtles live in seclusion at the bottom of the sea, only once in a hundred years. Even if it comes, it can't see the wooden yoke, so naturally it won't deliberately chase the wooden yoke. The chance that the blind turtle meets the wooden yoke is very small, but by chance, when the once-in-a-century blind turtle surfaced, it just bumped its head into the small hole on the wooden yoke that happened to float there, and it was even harder for us to catch a person sooner or later.

3. Sometimes, people are not unhappy, just feel unhappy. If you try to observe your own emotional changes, you will find that emotions are like floating clouds in the sky, which are changeable and easy to disperse. From a distance, it seems that people can walk and dance on it, but when you look closer, you will find that there is no place to stand.

4. Putting happiness on external pursuit is just like drinking salt water to quench your thirst. The more you get, the less satisfied you are.

Happiness comes from inner peace, and it is not enough to build a strong and peaceful inner world just by restraining negative emotions. We also need to actively cultivate positive attitudes and emotions.