"Spoken as well as written Chinese is, in one sense, a very difficult language. It is difficult, not because it is complex. Many European languages such as Latin and French are difficult because they are complex and have many rules. Chinese is difficult not because it is complex, but because it is deep. It is difficult because it is a language for expressing deep feeling in simple language. That is the secret of the difficulty of the Chinese language. In fact, as I have said else where, Chinese is a language of the heart: a poetical language. That is the reason why even a simple letter in prose written in classical Chinese reads like poetry."