I think goals should never be easy, they should force you to work, even if they are uncomfortable at the time.

I'm the reason your space won't expand.

发现可能性的极限的唯一方法，就是超越它们进入不可能。

历史不是过去，而是一张从特定视角绘制的地图，对现代旅行者有用。

质量从来不是偶然的；它始终是智慧努力的结果。