I don't think you should ever have to apologize for your excitement.

小小的行动，乘以数百万次，可以改变世界。

成功不是终点，失败也并非致命，重要的是继续前进的勇气。

只为自己活着的人，不值得活在世上。

That is what learning is. You suddenly understand something you've understood all your life, but in a new way.

真理从不畏惧辩论。