The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.

Within a computer natural language is unnatural.

你无法改变过去，但可以塑造未来。

在黑暗中，我们才能真正看清自己。

We can’t leave the problem-solving to the next generation. We have to do our part now.

"I keep on saying that anything is possible."