"This too shall pass," there's an Arabic folk tale with the same title. I like how it is double-edged sword this folktale can be depending on how you feel.
The folktale says:
"There was an Indian king who asked his minister to engrave on his ring a phrase that if he read it while sad he would be happy, and if he read it while happy he would be sad. So the minister wrote (This time will pass)."
It's not as if I like those self-help wisdom but this one seemed different to me. Because it isn't necessarily optimistic. In fact it's kind of nihilistic. It implies that neither the position nor the problems are permanent. They will all pass and become a positive or negative memory. Even you as a person will pass, like everything else. You will either do what immortalizes your memory, or you will melt into memory and become one of the passersby, like millions of others.