发愤忘食,乐以忘忧,不知老之将至云尔。
发愤研究学问,常常忘记吃饭,一旦有所收获便又高兴地忘记了忧愁,连自己的渐趋衰老也没有感觉到。
人生就像一首歌,有高潮也有低谷。
The thrill of discovery never gets old.
Can a man still be brave if he’s afraid. That is the only time a man can be brave.
A balcony or porch needs to be at least 6 feet (2m) deep or it won’t be used.