Every challenge is an opportunity in disguise.

我不知道。有时候当我感觉快哭出来的时候，往往会演变成一种几乎想笑的冲动。那一定是我当时的真实感受，因为我笑了，几乎咯咯咯地笑了。

A writer is somebody for whom writing is more difficult than it is for other people.

解析：知行工夫本不可离。