I think of a hero as someone who understands the degree of responsibility that comes with his freedom.

元素周期表不仅是一张图表，它是宇宙的故事。

La música es el lenguaje universal que nos une a todos.

We cannot know the cause, and therefore the effect, by reason alone.

The power of abstraction is that it allows us to reason about systems at a higher level, without getting bogged down in the details.