The only limit to our realization of tomorrow will be our doubts of today.

实现不可能的唯一方法是相信它是可能的。

I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself.

"The truth is rarely pure and never simple."

释义：美丽的彩云容易消散，明亮的圆月难得圆满。