出自《抱朴子·广訾》。病到很急的时候就会觉得良医是重要的了，世道动乱的时候就会觉得忠贞的臣子是重要的了。
活着是世界上最罕见的事，大多数人只是存在而已。
The best investments are those that align profitability with purpose.
The passion for office among members of Congress is very great, if not absolutely disreputable.
In the attosecond world, time is not a river but a series of snapshots waiting to be captured.