Language is the key to understanding higher mental processes.

 大多数人过着一种平静的绝望生活，他们心中的歌和他们一起埋入坟墓。

Let us unite our wills and form but one soul， one life， one being， in order that we may truly have common property.

经济发展中最重要的事情不是正确地做事，而是做正确的事情。