Doubt is not a pleasant condition， but certainty is an absurd one.

最多人的最大幸福是衡量对与错的标准。

Insanity is repeating the same mistakes and expecting different results.

Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor.

哪里有自由，哪里就是我的祖国。

我认为生活中最重要的事情就是让自己快乐，也让别人快乐。