大脑就像肌肉一样，当我们使用时会感到愉悦。理解是充满欢乐的。
The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
The only time success comes before work is in the dictionary.
形容人心难以捉摸，民众的行为像烟一样飘忽不定。