Mental phenomena are tools in the service of life.

应该忧虑的是自身不好，而不该忧虑别人不了解自己。《老子》中说“知人者智也，自知者明也。”人生要多些反思，也要多些扪心自问，看清自己更重要。

I don't regret the things I've done, I regret the things I didn't do when I had the chance.

Solving a problem simply means representing it so as to make the solution transparent.

if you are walking in the hell, keep walking!