The lyrics of a popular song go like this: "Don't wait until there are tears in your eyes, don't wait until there's regret in your heart, don't wait until the music stops and the dance steps cease. You should give yourself a chance."
In fact, the lyrics are just advising a person not to fall in love with someone who doesn't love him. However, when heard by those of us who are out in the world striving, it has a different flavor.
A job is just a job. Do it wholeheartedly, happily and reasonably. But one day, when you see the expressions on the faces of the people around you start to look desolate and the lights turn dim, it's time to retire and return to your hometown.
One needs to be rather sensitive. Don't just sit there blankly until there's regret in your heart. Take the opportunity to quietly step back. It doesn't matter if there's no one to see you off. There's the West Lake outside. You can just row a small boat gently on it.
The world is so big and there are beautiful sceneries in other places too. Why keep looking back and lingering over the same place again and again? Maybe that place is already full of guests and you're anxiously standing in a cold corner waiting for someone to stand up and give up their seat. How pitiful that would be.
It's okay to leave the dance floor at half past eleven. With the music lingering around, it has an endless charm. When you recall it later, you can talk about it with great relish.
Definitely avoid constantly knocking on the door, always wanting to go in and have fun. Being rejected again and again makes onlookers feel uncomfortable.
I've always been in favor of quitting while you're ahead. Moreover, when things turn bad, it's even more important to quit, so as to avoid having tears in your eyes.