Sustainability isn't an option; it's a responsibility we owe to the next generation.

Propaganda is to a democracy what the bludgeon is to a totalitarian state.

Today is difficult, tomorrow is more difficult, but the day after tomorrow is beautiful.

"The best way to avoid trouble is to stay out of it."

一有私念，就会迷惑昏庸；一耍脾气，处事就会偏颇无理性。

The periodic table hasn't changed, but how we use its elements must.