忧郁是悲伤中的幸福。
La mélancolie, c'est le bonheur d'être triste.
质量不是一种行为，而是一种习惯。
The poet is a man who plants a tree and then sits in its shade.
Sometimes you have to lose yourself to find yourself.
Sustainability is not an option; it's a responsibility we owe to future generations.