Tragic art, as it developed in the theaters of ancient Greece, in the fifth century B.C., was essentially an art form devoted to tracing how people fail, and also according them a level of sympathy, which ordinary life would not necessarily accord them. A few years ago, I was thinking about this, and I went to "The Sunday Sport," a tabloid newspaper I don't recommend you start reading if you're not familiar with it already.

We are all on the grid, and the grid is everywhere.

解释：处于安全环境时要考虑到可能出现的危险，考虑到危险就会有所准备，事先有了准备就可以避免祸患。

The pursuit of knowledge is a journey that never ends, and each discovery opens the door to new questions.

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

"The world is full of obvious things which nobody by any chance ever observes."