释义：人必须在现实事务中进行磨练，才能立定脚跟，无论外界是月朗风清还是狂风骤雨，都能保持内心平静坚定。

I don't think about limitations. I just think about possibilities.

Don't worry about the world coming to an end today. It's already tomorrow in Australia.

I do not lack the courage to think a thought all the way through, and thus far I have encountered no thought that I have feared.